/ Dictionary / Index N normal pentane: Meaning and Definition of Find definitions for: nor'mal pen'tane Pronunciation: [key] — Chem. Chem. pentane (def. 2). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. normal orthogonal normal pitch Related Content Daily Word Quiz: digression Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language