(emergency medicine) Abbreviation of intraosseous.

To educate children of both sexes together.

(Ancient Greece) Any member of the Branchidae, a family of priests who had charge of the Ionian sanctuary of Didyma before it was destroyed by the Persians.

(neuroanatomy) The third of twelve paired cranial nerves, which controls most of the eye's movements and constriction of the pupil and maintains an open eyelid.