noun · 3 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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/ˈbjuːtɪl/
/ˈbjuːtaɪl/
Southern-England:Recorded audio is listed in the source snapshot.
CMU ARPABET:B Y UW1 T AH0 L
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
noun
Meaning 1
Any of four isomeric univalent hydrocarbon radicals, C4H9, formally derived from butane by the loss of a hydrogen atom.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
noun
Meaning 2
A synthetic rubber made by the polymerization of isobutylene.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
3
noun
Meaning 3
a hydrocarbon radical (C4H9)
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Broader terms: group, radical, chemical group
History
Etymology
PIE word *gwṓws Etymology tree Proto-Indo-European *gwṓws Proto-Hellenic *gwous Ancient Greek βοῦς (boûs) Proto-Indo-European *tewh2- Proto-Indo-European *-rós Proto-Indo-European *tuh2rós Proto-Hellenic *tūrós Ancient Greek τῡρός (tūrós) Ancient Greek βούτῡρος (boútūros)der. English but- Proto-Indo-European *swel-der.? Ancient Greek ῡ̔́λη (hū́lē)der. Frenchder. English -yl English butyl From but- + -yl.
Across languages
Translations
8 source translations are retained for this English entry.
Catalan:
butil
— any of four isomeric univalent hydrocarbon radicals, C4H9
Finnish:
butyyli
— any of four isomeric univalent hydrocarbon radicals, C4H9
German:
Butyl
— any of four isomeric univalent hydrocarbon radicals, C4H9
Italian:
butile
— any of four isomeric univalent hydrocarbon radicals, C4H9
Portuguese:
butil
— any of four isomeric univalent hydrocarbon radicals, C4H9
Portuguese:
butilo
— any of four isomeric univalent hydrocarbon radicals, C4H9
Romanian:
butil
— any of four isomeric univalent hydrocarbon radicals, C4H9
Spanish:
butilo
— any of four isomeric univalent hydrocarbon radicals, C4H9