Trimethylpentane

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    Any of several isomers of octane having three methyl groups attached to a pentane chain; especially isooctane, used as a standard for octane number

Etymology

From trimethyl + pentane.

Related phrases

octane number

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