/ Dictionary / Index S straight-chain: Meaning and Definition of Find definitions for: straight-chain Pronunciation: (strāt'chān'), [key] — n. Chem. an open chain of atoms, usually carbon, with no side chains attached to it. Also calledCf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: straight-chain (Thesaurus) straight bill of lading straight chair Related Content Daily Word Quiz: blanch Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language