/ Dictionary / Index P perimorph: Meaning and Definition of Find definitions for: per•i•morph Pronunciation: (per'u-môrf"), [key] — n. a crystal of one mineral enclosing that of another mineral. Cf.(def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. perimeter perimysium Related Content Daily Word Quiz: morose Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language