1. the act of perceiving; observation; attention: to escape notice. 2. take notice to pay attention; attend. 3. take no notice of to ignore or disregard. 4. information about a future event; warning; announcement. 5. a displayed placard or announcement giving information.
Nicotine: A Stimulant Nicotine, the chemical that makes addicts out of cigarette smokers, is a stimulant with properties similar to those of cocaine and amphetamine (speed). Nicotine provides the pick-me-up that smokers feel.
Nicotine (n.). An alkaloid which is the active principle of tobacco (C10H14N2). It occurs in tobacco plants (Nicotiana tabacum and Nicotiana rusticum) to the extent of 2 to 8%, in combination with malic acid or citric acid. It is a colorless, transparent, oily liquid, having an acrid odor, and an acrid burning taste.