| AO | abdominal aorta; achievement orientation; acid output; acridine orange; ankle orthosis; anodal openi... |
|---|---|
| ARAO | angiographic area of right anterior oblique projection |
| IO | incisal opening; inferior oblique; inferior olive; internal os; interorbital; intestinal obstruction... |
| LAO | left anterior oblique; left atrial overload; Licentiate of the Art of Obstetrics |
| LIO | left inferior oblique |