Dictionary.com
Thesaurus.com

butyl group

American  

noun

Chemistry.

  1. any of four univalent isomeric groups having the formula C 4 H 9 –.

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.