What is the meaning of Nicotine?

An alkaloid (C10H14N2), commonly occurring in the tobacco plant. In small doses it is a habit-forming stimulant; in larger doses it is toxic and is often used in insecticides.

Tobacco, cigarettes

nicotine (C10H14N2, alkaloid)

nicotine (alkaloid)

nicotine

plural of nicotina

Source: wiktionary.org