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.
Whatâs in a cigarette, 599 ingredients in a cigarette. Nicotine in small doses acts as a stimulant to the brain. In large doses, itâs a depressant, inhibiting the flow of signals between nerve cells. In even larger doses, itâs a lethal poison, affecting the heart, blood vessels, and hormones.