noun · 2 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
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/feɪn/
rhymes with -eɪn
homophone: fane
homophone: fain
homophone: feign
1
noun
Meaning 1
Any of several substructures of a more complex molecule.
Definition source: English Wiktionary via Wiktextract