/ Dictionary / Index U unit cell: Meaning and Definition of Find definitions for: u'nit cell" Pronunciation: [key] — Crystall. Crystall. the simplest unit of a regular lattice. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. unit card unit character Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language