/ Dictionary / Index D diadromous: Meaning and Definition of Find definitions for: di•ad•ro•mous Pronunciation: (dī-ad'ru-mus), [key] — adj. (of a leaf&hasp;) having a fanlike arrangement of veins. (of fish) migrating between fresh and salt waters. Cf. anadromous, catadromous. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: diadromous (Thesaurus) diadochy diaeresis Related Content Daily Word Quiz: hedonist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language