noun. An abdominal muscle.

noun. The eleventh month of the Jewish civil year, and the fifth of the ecclesiastical year, answering to a part of July and a part of August. In the Syriac calendar Ab is the last summer month.

noun. A prefix of Latin origin, denoting disjunction, separation, or departure, off, from, away, etc., as in abduct, abjure, etc.

noun. The fifth month of the Jewish year according to the ecclesiastical reckoning, the eleventh by the civil computation, coinciding nearly with August.

noun. An abscess caused by injecting an illegal drug, usually heroin.

noun. The early stages of; the beginning process; the start.

abbreviation. abort or abortion

abbreviation. about

noun. a bachelor's degree in arts and sciences

noun. the muscles of the abdomen

noun. the blood group whose red cells carry both the A and B antigens

noun. the eleventh month of the civil year; the fifth month of the ecclesiastical year in the Jewish calendar (in July and August)

"= Similar instrumental uses of _ab_ at _Her_ X 138 'tunicas lacrimis sicut _ab imbre_ graues', _AA_ III 545 'ingenium placida mollitur _ab arte_', _Met_ I 65-66 'contraria tellus/nubibus assiduis pluuiaque madescit ab Austro', _Met_ IV 162-63 'pectus ... adhuc _a caede_ tepebat', and _Fast_ V 323 'caelum nigrescit _ab Austris_'."