| ANS | acanthion; American Nutrition Society; 8-anilino-1-naphthalene-sulfonic acid; anterior nasal spine; ... |
|---|---|
| AOA | American Osteopathic Association; Administration on Aging; Alpha Omega Alpha Honor Society; American... |
| AOSSM | American Orthopedic Society for Sports Medicine |
| ARRS | American Roentgen Ray Society |
| ARSC | arylsulfatase C; Associate of the Royal Society of Chemistry |