/ Dictionary / Index B butylene: Meaning and Definition of Find definitions for: bu•tyl•ene Pronunciation: (byt'l-ēn"), [key] — Chem. Chem. —n. any of three isomeric, gaseous hydrocarbons having the formula CH, of the alkene series. —adj. containing the butylene group. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: butylene (Thesaurus) butylated hydroxytoluene butylene group Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language