ON Medical Abbreviation

Oncology Nutrition

Onlay

Osteonecrosis of The Femoral Head

Osteonecrosis

Bone death resulting from poor blood supply to an area of bone. Also known as aseptic necrosis or avascular necrosis.

Osteonectin

Optic Nerve

The optic nerve, also known as cranial nerve II, is a paired nerve that transmits visual information from the retina to the brain. The optic nerve is derived from optic stalks during the seventh week of development and is composed of retinal ganglion cell axons and glial cells. In humans, the optic nerve extends from the optic disc to the optic chiasm and continues as the optic tract to the lateral geniculate nucleus, pretectal nuclei, and superior colliculus.

oral nasal

omne nocte - every night

every night (from Latin omni nocte)