noun ·Uncommon ·Advanced level

Definitions

Noun

1. 1
   Any of four isomeric univalent hydrocarbon radicals, C₄H₉, formally derived from butane by the loss of a hydrogen atom.
2. 2
   a hydrocarbon radical (C4H9) wordnet
3. 3
   A synthetic rubber made by the polymerization of isobutylene.

Synonyms

All synonyms

butylic

Etymology

PIE word *gʷṓws From but- + -yl.

Related phrases

butyl alcoholbutyl methoxydibenzoylmethanebutyl rubbermethyl t-butyl ethermethyl tert-butyl ethermethyl tertiary butyl ethert-butyltert-butyltertiary butyl

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.