What does coniine mean?
Coniine is a colorless, oily, intensely poisonous alkaloid with the formula C₈H₁₇N, best known as the chief toxic principle of poison hemlock (Conium maculatum), the plant famously used in the execution of Socrates. Chemically, it belongs to the piperidine class of alkaloids and acts by blocking nerve impulses to the muscles, producing ascending paralysis that can lead to death through respiratory failure. The word is technical in register, appearing almost exclusively in chemistry, toxicology, pharmacology, and classical history rather than everyday speech. Coniine holds a notable place in scientific history: in 1886 it became the first alkaloid ever synthesized artificially, a milestone for organic chemistry. Because of its association with ancient executions and forensic toxicology, the term carries strong morbid and historical connotations, making it memorable despite its narrow, specialist usage.
nounA highly poisonous volatile alkaloid, C₈H₁₇N, found in poison hemlock (Conium maculatum); it is an oily liquid that depresses the central nervous system and causes death by respiratory paralysis.
- A toxic piperidine alkaloid, C₈H₁₇N, obtained chiefly from poison hemlock and responsible for its paralyzing effects on the nervous system.
"The fatal draught of hemlock given to Socrates contained coniine as its principal active alkaloid."
"Chemists identified coniine as the compound responsible for hemlock's deadly paralysis of the muscles used in breathing."
"In 1886, Albert Ladenburg achieved the first laboratory synthesis of coniine, a landmark in the history of organic chemistry."
Rare; coniine is normally treated as an uncountable mass noun. A plural may appear when referring to multiple samples or stereoisomeric forms of the compound.
"The laboratory compared several synthetic coniines with the natural alkaloid extracted from hemlock."
Coniine made history twice over: it killed Socrates in 399 BC, and in 1886 it became the first alkaloid ever synthesized in a laboratory.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of coniine
The word derives ultimately from the Greek 'kōneion', meaning hemlock, via the New Latin genus name Conium. It entered English scientific vocabulary in the nineteenth century, when chemists first isolated and characterized the alkaloid from hemlock extract, forming the name by adding the '-ine' suffix standardly used for alkaloids such as nicotine and morphine. Its closest relatives in modern usage are the genus name Conium and the related hemlock alkaloid coniceine.
How coniine is actually used
A technical term confined mainly to chemistry, toxicology, pharmacology, and historical accounts of poisoning. It is treated as a mass noun in most contexts; a plural form exists but is rare.
Easily confused with coniine
Quinine is a medicinal alkaloid from cinchona bark used against malaria, whereas coniine is the deadly alkaloid of poison hemlock.