/ Dictionary / Index C crustal plate: Meaning and Definition of Find definitions for: crus'tal plate' Pronunciation: [key] — Geol. Geol. a large block or tabular section of the lithosphere that reacts to tectonic forces as a unit and moves as such. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. crustal crusted Related Content Daily Word Quiz: kiln Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language