English

Preposition

ab.

1. Abbreviation of about.^[1][2]

Noun

ab.

1. Abbreviation of antibody.^[3]
2. Abbreviation of abridgement.

References

1. ↑ Laurence Urdang (editor), The Random House College Dictionary (Random House, 1984 [1975], ISBN 0-394-43600-8), page 1
2. ↑ William Morris (editor), The American Heritage Dictionary of the English Language (1971 [1969]; American Heritage Publishing Co., Inc.; ISBN 0-395-09066-0), page 1
3. ↑ Thomas, Clayton L., editor (1940) Taber's Encyclopedic Medical Dictionary, 5th edition, Philadelphia, PA: F. A. Davis Company, ISBN 0-8036-8313-8, published 1993, page 1

Spanish

Noun

ab. m ‎(uncountable)

1. Abbreviation of abril; Apr. (April)