OA

Abbreviation for occipitoanterior position.

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[o]esophageal atresia; obstructive apnea; occipital artery; occipito-anterior; occiput anterior; occupational asthma; octanoic acid; ocular albinism; old age; okadaic acid; oleic acid; on admission or arrival; open appendectomy; opiate analgesia; ophthalmic artery; opsonic activity; optic atrophy; oral airways; oral alimentation; organic anion; orotic acid; osteoarthritis; osteoarthrosis; ovalbumin; ovarian antibody; overall assessment; Overeaters Anonymous; oxalic acid

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OA abbr osteoarthritis

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ocular albinism.