A poisonous colorless liquid alkaloid, C5H10NC3H7, found in the poison hemlock.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "coniine" in a sentence
"I also had to add a pinch of coniine (which causes blurred vision) as well as -- the cherry on the cake -- a dash of stramonium (which can cause dizziness and hallucinations)."
"And why do you say so confidently that it will be interesting to find out who used the coniine?"
"This was heated with paraldehyde, whereby it was converted into allylpyridine (48 grammes), and this by reduction with sodium yielded alpha-propylpyridine, a body in almost every respect identical with coniine."