| ARC | accelerating rate calorimetry; acquired immunodeficiency syndrome-related complex; active renin conc... |
|---|---|
| ASA | acetylsalicylic acid; active systemic anaphylaxis; Adams-Stokes attack; American Society of Anesthes... |
| ASC | acetylsulfanilyl chloride; altered state of consciousness; ambulatory surgical center; American Soci... |
| ATLA | adult T-cell leukemia virus-associated antigen; alternatives to laboratory animals |
| AU | according to custom [Lat. ad usum]; allergenic unit; ngstrom unit; antitoxin unit; arbitrary unit; A... |