/ Dictionary / Index A atrichia: Meaning and Definition of Find definitions for: a•trich•i•a Pronunciation: (ā-trik'ē-u, u-trik'-), [key] — n. Med. congenital absence or loss of hair. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. atrial natriuretic factor atrioventricular Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language