nicotine

n. toxic alkaloid found in tobacco (used as insecticide in its liquid form); tobacco products (Slang)

Nicotine is an alkaloid found in the nightshade family of plants (Solanaceae), predominantly in tobacco, and in lower quantities in tomato, potato, eggplant (aubergine), and green pepper. Nicotine alkaloids are also found in the leaves of the coca plant. Nicotine constitutes 0.3 to 5% of the tobacco plant by dry weight, with biosynthesis taking place in the roots, and accumulating in the leaves. It functions as an antiherbivore chemical, being a potent neurotoxin with particular specificity to insects; therefore nicotine was widely used as an insecticide in the past, and currently nicotine derivatives such as imidacloprid continue to be widely used.
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Noun
1. an alkaloid poison that occurs in tobacco; used in medicine and as an insecticide
(hypernym) plant toxin, phytotoxin
(substance-holonym) tobacco, baccy

n. nicotine, toxic alkaloid found in tobacco, used as insecticide in its liquid form

n. nicotine, toxic alkaloid found in tobacco, used as insecticide in its liquid form