acro-

1. a combining form with the meanings “height,” “tip end,” “extremities of the body,” used in the formation of compound words: acrophobia.

combining form

1. denoting something at a height, summit, top, tip, beginning, or endacropolis; acrogen
2. denoting an extremity of the human bodyacromegaly

word-forming element meaning “highest, topmost, at the extremities,” before vowels, acr-, from Greek akro- “pertaining to an end, extreme,” comb. form of akros “at the end, at the top” (see acrid).

pref.

1. Top; summit; height:acrophobia.
2. Tip; beginning:acrosome.
3. Extremity of the body:acroparalysis.