What does atropine mean?
Atropine is a naturally occurring alkaloid extracted from plants of the nightshade family, most famously deadly nightshade (Atropa belladonna). Chemically, it blocks the action of acetylcholine at muscarinic receptors, which produces its characteristic effects: dilated pupils, reduced salivation and sweating, increased heart rate, and relaxed smooth muscle. These effects make it valuable in medicine — ophthalmologists use it to dilate the eye, emergency physicians give it for abnormally slow heart rhythms, and it serves as an antidote in certain pesticide and nerve-agent poisonings. The name derives from Atropos, the Greek Fate who severed the thread of life, a reminder that the source plant is highly toxic in uncontrolled doses. Atropine belongs to technical register, appearing chiefly in medical writing, prescriptions, and pharmacology rather than everyday speech.
nounA poisonous alkaloid obtained from deadly nightshade (Atropa belladonna), used in medicine to dilate the pupils, reduce secretions, and treat certain heart-rhythm disturbances and poisonings.
- A bitter crystalline alkaloid from deadly nightshade that blocks acetylcholine receptors, used medically as an antispasmodic, to dilate pupils, and to treat bradycardia and certain poisonings.
"The paramedic administered atropine to correct the patient's dangerously slow heartbeat."
"Ophthalmologists often use atropine drops to keep the pupil dilated during an examination."
"Because atropine blocks nerve signals to glands, it was once given to soldiers as protection against certain nerve agents."
Rare; the plural appears mainly in laboratory or pharmaceutical contexts referring to multiple preparations or doses.
"The pharmacy stocks several atropines of varying concentrations."
Atropine is named after Atropos, the Greek Fate who cuts the thread of life — a nod to the fact that the plant it comes from can kill you.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of atropine
Atropine takes its name from Atropa belladonna, the deadly nightshade plant from which it was first isolated, and the genus name Atropa honors Atropos, the eldest of the three Greek Fates who cut the thread of human life — an allusion to the plant's lethal nature. The underlying Greek root relates to tropos, meaning "turn" or "change," also seen in words like trope and heliotrope. The substance itself was isolated and named by chemists in the early nineteenth century, around 1820–1833, as alkaloid chemistry advanced in Europe.
How atropine is actually used
Strictly a technical term used in medicine, pharmacology, and ophthalmology; it rarely appears in everyday conversation except in clinical contexts. It is typically treated as an uncountable mass noun when referring to the substance generally, though it can take plural form when referring to doses or preparations.
Easily confused with atropine
Atrophy is the wasting away or decline of a body part or skill, whereas atropine is a drug derived from deadly nightshade.