- A prefix which identifies units conforming to the cgs system. Seen, for example, in abvolt.
(written as AB)the highest socio-economic group, consisting of professionals with a high disposable income
(written as AB)a human blood type of the ABO system, containing the A and B antigens. Someone with this type of blood can donate to people of the same group and receive blood from people with this type or with type O, A or B.