acr- combining form oracro-alsoakr-orakro- Etymology: Middle French or Greek; Middle French acro-, from Greek akr-, akro-, from akros topmost, extreme; akin to Greek akmē point — more at edge 1.: beginning : end : tip < acrology > 2. a.: top : peak : summit < acropetal > < acrocephaly > b.: height < acrophobia > c.: extremity of the body, especially the human body < acrocyanosis >