A|B|O

a|bo «A boh», noun, plural a|bos.

Australian Slang. an aborigine.

A|B|O «AY BEE OH», adjective, noun.

–adj.

of or having to do with a system of classifying blood factors, especially to determine blood compatibility in transfusions. The main factors or groups are A, B, AB, and O.

–n. this system of classification.