Swelling of the optic disc (where the optic nerve enters the eyeball)

• Usually associated with an increase in intraocular pressure

WordNet Word definitions in WordNet
n. swelling of the optic disc (where the optic nerve enters the eyeball); usually associated with an increase in intraocular pressure

Wiktionary Word definitions in Wiktionary
n. (context medicine English) A swelling of the optic disc caused by intracranial pressure

Wikipedia Word definitions in Wikipedia
Papilledema (or papilloedema ) is optic disc swelling that is caused by increased intracranial pressure . The swelling is usually bilateral and can occur over a period of hours to weeks. Unilateral presentation is extremely rare. Papilledema is mostly seen ...

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
also papilloedema , 1908, from papilla + edema .