Etymology
Advertisement

butyl (n.)

hydrocarbon radical, 1855, from butyric acid, a product of fermentation found in rancid butter, from Latin butyrum "butter" (see butter (n.)).

updated on September 12, 2017

Advertisement
Advertisement
Definitions of butyl from WordNet

butyl (n.)
a hydrocarbon radical (C4H9);
From wordnet.princeton.edu, not affiliated with etymonline.