| A | B |
|---|
| Abduction | movement away from the midline |
| Abrasion | scraping injury of the skin |
| Abscess | collection of pus |
| Acclimatization | adapting the body to the temperature |
| Acute | severe; rapid or brief |
| Adduction | movement toward the midline |
| Adhesion | sticking together of binding of tissue |
| Aerobic | work requiring oxygen |
| Anaerobic | work not requiring oxygen |
| Analgesic | counter-irritant which reduces pain |
| Anoxia | lack of oxygen |
| Anterior | pertaining to the front |
| Articulation | joining together of parts at a joint |
| Atrophy | Decrease in muscle tissue |
| Avascular | devoid of the circulatory system |
| Avulsion | Tearing off of the bone or tissue |
