/ Dictionary / Index H hexamethylene: Meaning and Definition of Find definitions for: hex•a•meth•yl•ene Pronunciation: (hek"su-meth'u-lēn"), [key] — n. Chem. cyclohexane. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hexamethonium hexamethylenetetramine Related Content Daily Word Quiz: diligent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language