/ Dictionary / Index P peritectic: Meaning and Definition of Find definitions for: per•i•tec•tic Pronunciation: (per"i-tek'tik), [key] — adj. Physical Chem. of or noting the phase intermediate between a solid and the liquid that results from the melting of the solid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. peristylium perithecium Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language