/ Dictionary / Index M micropyle: Meaning and Definition of Find definitions for: mi•cro•pyle Pronunciation: (mī'kru-pīl"), [key] — n. any minute opening in an ovum through which a spermatozoon can enter, as in many insects. the minute orifice or opening in the integuments of an ovule. See diag. under Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: micropyle (Thesaurus) micropump micropyrometer Related Content Daily Word Quiz: dissonant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language