| ANS | acanthion; American Nutrition Society; 8-anilino-1-naphthalene-sulfonic acid; anterior nasal spine; ... |
|---|---|
| ARA | Academy of Rehabilitative Audiometry; acetylene reduction activity; American Rheumatism Association;... |
| ARCS | Associate of the Royal College of Science |
| ARO | Associate for Research in Ophthalmology |
| ARRC | Associate of the Royal Red Cross |