Etymology 1
Latin
Preposition
ab-
- etymologically the same as English of, off. See of
Prefix
- A prefix in many words of Latin origin. It signifies from, away, separating, or departure, as in abduct, abstract, abscond. See a-.
Etymology 2
Abreviated from absolute
Prefix
- an indicator that an electromagnetic unit is a part of the now obsolete Centimetre-gram-second (or cgs) system of measurement.