a.a.
See also: Appendix:Variations of "aa"
English
Initialism
a.a.
- achievement age[1]
- alcoholics anonymous[1]
- amino acid[1]
- arteriae[1]
References
- Thomas, Clayton L. (1993)
- Thomas, Clayton L., editor (1940) Taber's Encyclopedic Medical Dictionary, 5th edition, Philadelphia, PA: F. A. Davis Company, published 1993, →ISBN, page 1