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