acro-

American  

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

   acrophobia.

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acro- British  

combining form

1. denoting something at a height, summit, top, tip, beginning, or end

   acropolis

   acrogen

2. denoting an extremity of the human body

   acromegaly

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Etymology

Origin of acro-

< Greek, combining form of ákros topmost, highest; akin to Latin ācer sharp. Cf. acme, ear ²