functional group
US /ˈfʌŋkʃənəl ˌɡruːp/
UK /ˈfʌŋkʃənəl ˌɡruːp/

1.
官能团
a group of atoms responsible for the characteristic reactions of a particular compound
:
•
The hydroxyl group (-OH) is a common functional group in alcohols.
羟基(-OH)是醇类中常见的官能团。
•
Understanding functional groups helps predict chemical reactivity.
了解官能团有助于预测化学反应性。