The first time I encountered the word "entheogen," I had to look it up.
I knew "psychedelic." I'd heard "hallucinogen" thrown around in college psychology courses. I'd even come across "plant medicine" in the wellness spaces I frequented online.
But "entheogen"? That was new.
And when I finally understood its origins, its etymology, and the cultural battles that birthed it into existence, I realized something I hadn't expected: the words we use to describe these substances reveal far more about our intentions, our worldviews, and our relationship to the sacred than the chemical compounds ever could.
The Ancient Absence of Labels
For thousands of years, indigenous cultures across the globe used what we now call entheogens without needing a single unifying term.
The Mazatec people of Mexico worked with teonanácatl ("flesh of the gods") long before Spanish colonizers arrived. The Shipibo and other Amazonian peoples cultivated relationships with ayahuasca (meaning "vine of the soul" or "vine of the ancestors" in Quechua) for generations. The Native American peoples of what is now the southern United States and Mexico revered peyotl, which derives from the Nahuatl language and roughly translates to "divine messenger" or "glisten."
Notice what these original names share: sacred language. Spiritual connotation. A relationship.
These were descriptions arising from lived experience within specific cosmological frameworks. The Huichol people of Mexico call peyote hikuri, and the plant is understood as a deity itself. The Santo Daime Church refers to ayahuasca as Daime, derived from the Portuguese phrase dai-me ("give me"), reflecting the prayerful invocation that characterizes their ceremonies: "Give me strength, give me love."
Each indigenous name contains an encoded relationship between the plant, the human, and the divine. The naming becomes a form of reverence.
When Western Science Arrived
Then came the researchers.
In 1897, German chemist Arthur Heffter isolated mescaline from the peyote cactus. This marked the beginning of Western science's attempt to understand, classify, and ultimately control substances that indigenous peoples had worked with for millennia.
And with scientific inquiry came the need for scientific terminology.
Early researchers reached for words like "phantastica" (coined by German toxicologist Louis Lewin in his 1924 classification of psychoactive drugs), emphasizing the fantastical, otherworldly nature of the experience. Others used "psychotomimetic," meaning "psychosis-mimicking," a term that framed sacred experiences as symptoms of mental illness rather than pathways to insight.
This framing mattered. A substance labeled "psychosis-mimicking" carries fundamentally different cultural weight than one called "flesh of the gods."
By the early 1950s, as researchers at institutions like the Saskatchewan Mental Hospital in Canada began studying mescaline and LSD, the terminological problem grew more acute. The substances produced experiences that bore little resemblance to delirium or psychosis. Something else was needed.
The Birth of "Psychedelic"
In 1956, psychiatrist Humphry Osmond found himself corresponding with author Aldous Huxley about what to call these peculiar compounds.
Huxley, who had famously taken mescaline under Osmond's supervision in 1953, proposed "phanerothyme," from the Greek words for "to show" and "spirit." He even supplied a couplet: "To make this mundane world sublime, take half a gram of phanerothyme."
Osmond had a different idea. He combined the Greek words psyche (mind or soul) and delos (to show or manifest) and offered his own verse in return: "To fathom Hell or soar angelic, just take a pinch of psychedelic."
Osmond first presented this term at a meeting of the New York Academy of Sciences in 1957, describing it as "clear, euphonious and uncontaminated by other associations" (Osmond, 1957). He meant it as an improvement over the clinical coldness of "hallucinogen," a word that implied false perceptions and delusional states.
"Psychedelic" was supposed to honor the experience. Mind-manifesting. Soul-revealing.
And for a brief period, it did exactly that.
The word "psychedelic" was born in an era of careful clinical research and genuine philosophical inquiry about the nature of consciousness.
When the Counterculture Claimed a Word
By the mid-1960s, "psychedelic" had escaped the laboratory.
Timothy Leary was advocating that people "turn on, tune in, drop out." Ken Kesey and the Merry Pranksters were hosting Acid Tests in San Francisco, distributing LSD supplied by chemist Owsley Stanley and accompanied by light shows and the discordant improvisations of what would become the Grateful Dead. The word "psychedelic" became inextricably linked with tie-dye, Vietnam War protests, and a cultural revolution that threatened the established order.
The backlash was swift. The Drug Abuse Control Amendments of 1965 restricted hallucinogens. Sandoz Laboratories stopped supplying LSD for research in 1966. By 1968, LSD possession was outlawed federally. The Controlled Substances Act of 1970 placed LSD, psilocybin, and mescaline into Schedule I, effectively ending most legitimate research for decades.
"Psychedelic" had become, in the eyes of mainstream society, a dangerous word. It conjured images of addled hippies, social unrest, and moral decay. The term that Osmond had intended as neutral and descriptive now carried decades of cultural baggage.
The Reclamation: "Entheogen" Emerges
It was against this backdrop that a group of scholars gathered in the late 1970s to propose a radical linguistic intervention.
In 1979, ethnobotanists and mythologists Carl A.P. Ruck, Jeremy Bigwood, Danny Staples, Richard Evans Schultes, Jonathan Ott, and R. Gordon Wasson published a short paper in the Journal of Psychedelic Drugs titled simply "Entheogens."
Their argument was direct: the existing terminology was inadequate. "Hallucinogen" implied false perceptions. "Psychedelic" had become irreversibly associated with 1960s counterculture. Neither term captured what actually happened when these substances were used in traditional ceremonial contexts.
They proposed "entheogen," derived from the Greek entheos ("full of the god, inspired, possessed") and genesthai ("to come into being"). The literal translation: "generating the divine within."
As the authors themselves wrote: "In a strict sense, only those vision-producing drugs that can be shown to have figured in shamanic or religious rites would be designated entheogens, but in a looser sense, the term could also be applied to other drugs, both natural and artificial, that induce alterations of consciousness similar to those documented for ritual ingestion of traditional entheogens" (Ruck et al., 1979).
The word "entheogen" was born from a desire to restore the sacred dimension that Western science and counterculture had both, in their own ways, obscured.
What "Entheogen" Gets Right
The beauty of "entheogen" lies in what it acknowledges without requiring.
The term does not claim that these substances create God or divinity. The prefix en- ("within") paired with theos ("god") and genesthai ("to generate" or "to come into being") suggests revelation rather than fabrication. Something already present becomes manifest. The inner becomes visible.
This framing aligns with the experiential reports of countless ceremony participants across traditions. Whether working with peyote in a Native American Church tipi, drinking ayahuasca with the Santo Daime in Brazil, or consuming psilocybin mushrooms in a facilitated setting, participants often describe encountering something they perceive as having existed all along. The sacrament does not manufacture divinity so much as remove the barriers preventing its perception.
The word also carries implicit respect for the ceremonial context in which these substances have traditionally been used. By invoking the sacred, it distinguishes religious use from recreational consumption of the same chemical compounds.
Contemporary Terminology in Flux
Today, we find ourselves swimming in a sea of competing terms.
"Psychedelic" has experienced a rehabilitation of sorts. Organizations like the Multidisciplinary Association for Psychedelic Studies (MAPS) retained the word even during decades of prohibition, betting that science would eventually vindicate these substances. The "psychedelic renaissance" now underway in research institutions has brought the term back into mainstream medical discourse.
"Hallucinogen" remains the preferred terminology of regulatory bodies like the DEA. It persists in much scientific literature, though its pejorative connotations continue to trouble researchers and practitioners who recognize that the experiences produced by these compounds bear little resemblance to the disordered perceptions of delirium or psychosis.
"Plant medicine" has gained traction in wellness and therapeutic communities. The term emphasizes the natural origin of many sacred substances and positions them within healing frameworks familiar to modern audiences. Critics note that this terminology can obscure the spiritual dimensions of traditional use, reducing sacraments to pharmaceutical interventions.
"Entheogen" continues to hold particular currency in religious and spiritual communities. It appears in legal documents, including the resolution passed by the Oakland City Council in 2019 that decriminalized certain entheogenic plants and fungi. The word has demonstrated remarkable staying power in contexts where the sacred dimension remains paramount.
"Sacrament" carries explicit religious weight. Within the Native American Church, peyote is referred to as a sacrament, much as bread and wine function in Christian Eucharist. The União do Vegetal and Santo Daime churches similarly describe ayahuasca as their sacrament. This terminology asserts legal protection under religious freedom frameworks while honoring the spiritual significance these communities attribute to their practices.
The Politics of Naming
Language is never neutral. The words we choose to describe sacred plants and their effects carry political, legal, and cultural implications.
When legislators debate drug policy, the terminology shapes the conversation. "Hallucinogen" evokes danger, mental instability, and unpredictability. "Medicine" invokes the controlled legitimacy of the healthcare system. "Sacrament" triggers constitutional protections for religious practice.
The Native American Church's long legal battles over peyote demonstrate this dynamic. The church formally incorporated in 1918 in part to protect ceremonial peyote use by framing it within recognized religious structures. Their success in securing federal protections in the 1994 amendment to the American Indian Religious Freedom Act relied heavily on establishing peyote as a sacrament rather than a recreational substance.
Similarly, the União do Vegetal prevailed in the 2006 Supreme Court case Gonzales v. O Centro Espírita Beneficente União do Vegetal by successfully arguing that ayahuasca (which they call hoasca or vegetal) functions as a sacrament within their religious tradition.
The terminology communities choose is itself a form of boundary-setting, distinguishing sacred practice from recreational consumption and claiming legal protections accordingly.
Indigenous Resistance to External Labels
An important caveat: many indigenous communities resist the imposition of any Western terminology on their sacred practices.
Steven Benally, a member of the Diné Nation (Navajo) and lifelong member of the Native American Church, has spoken publicly about how terms like "psychedelic" fail to capture the relationship his community has with peyote. The label feels external, colonial, reductive.
Similarly, some Amazonian ayahuasca traditions maintain their own vocabulary precisely to preserve the integrity of their cosmological frameworks. The Shipibo people, for instance, speak of plantas maestras ("master plants" or "teacher plants"), emphasizing the relationship of instruction and guidance that characterizes their work with these substances.
There is wisdom in attending to these indigenous perspectives. The proliferation of Western terminology, whether "psychedelic," "entheogen," or "plant medicine," risks flattening rich spiritual traditions into categories legible to outsiders but stripped of their original meaning.
Questions for Reflection
When discussing sacred plants and their ceremonial use, consider:
- What assumptions does each term carry, and whose worldview does it reflect?
- When a community chooses specific terminology for its sacrament, what boundaries is it establishing, and why might those boundaries matter?
- How might the language used to describe these experiences shape what participants expect, perceive, and integrate?
Summary
The evolution of terminology surrounding sacred plants reflects broader cultural negotiations about meaning, legitimacy, and control. From indigenous names encoding spiritual relationships, through Western science's clinical labels, to the countercultural adoption and subsequent rehabilitation of "psychedelic," to the scholarly intervention of "entheogen," each linguistic shift carries embedded assumptions about what these substances are, what they do, and who has authority to define the experience.
For communities working with these plants in sacred contexts, the choice of terminology becomes itself a form of practice. "Sacrament" asserts religious significance. "Entheogen" acknowledges the generation of divine encounter. Indigenous terms honor ancestral relationships that predate Western contact by thousands of years.
The words communities use to describe their sacred practices are themselves sacred. They carry intention, establish boundaries, and shape the container within which transformation becomes possible.
This article is intended for educational purposes and does not constitute medical or legal advice.
References
Osmond, H. (1957). A review of the clinical effects of psychotomimetic agents. Annals of the New York Academy of Sciences, 66(3), 418-434.
Ruck, C.A.P., Bigwood, J., Staples, D., Ott, J., & Wasson, R.G. (1979). Entheogens. Journal of Psychedelic Drugs, 11(1-2), 145-146.
Nichols, D.E. (2004). Hallucinogens. Pharmacology & Therapeutics, 101(2), 131-181.
Native American Church. (n.d.). History and practices. Encyclopedia of Oklahoma History and Culture.
MacRae, E. (2008). The ritual use of ayahuasca by three Brazilian religions. In B.C. Labate & E. MacRae (Eds.), Ayahuasca, ritual and religion in Brazil. Equinox Publishing.