담배의 주요 성분인 무색 또는 황색의 독성 액체로, 소량으로는 흥분제 역할을 하며 살충제로도 사용됨.
A toxic colorless or yellowish oily liquid that is the chief active constituent of tobacco, acting as a stimulant in small doses and used in insecticides.
예문:
"Nicotine is highly addictive and is the primary reason people continue to use tobacco products."
"The patch releases a controlled amount of nicotine into the bloodstream to help smokers quit."
"In agriculture, nicotine-based compounds have been used as potent insecticides to protect crops."