/ Dictionary / Index A apteryx: Meaning and Definition of Find definitions for: ap•ter•yx Pronunciation: (ap'tu-riks), [key] — n. kiwi (def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: apteryx (Thesaurus) apterygote aptitude Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language