/ Dictionary / Index P phenotype: Meaning and Definition of Find definitions for: phe•no•type Pronunciation: (fē'nu-tīp"), [key] — n. Genetics. the observable constitution of an organism. the appearance of an organism resulting from the interaction of the genotype and the environment. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: phenotype (Thesaurus) phenothiazine phenoxide Related Content Daily Word Quiz: miscreant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language