abo
- n a dark-skinned member of a race of people living in Australia when Europeans arrived
abo blood group system
- n a classification system for the antigens of human blood; used in blood transfusion therapy; four groups are A and B and AB and O
abo group
- n a classification system for the antigens of human blood; used in blood transfusion therapy; four groups are A and B and AB and O
abo system
- n a classification system for the antigens of human blood; used in blood transfusion therapy; four groups are A and B and AB and O
abocclusion
- n the condition in which the upper teeth do not touch the lower teeth when biting