Butyl

//ˈbjuːtɪl// noun

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.

Etymology

PIE word *gʷṓws From but- + -yl.

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