A small sebaceous cyst of the eyelid resulting when a Meibomian gland is blocked

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
small tumor in the eyelid, 1708, from Greek khalazion , diminutive of khalaza "hail, hailstone; small lump or knot; pimple," from PIE root *gheled- "hail."

WordNet Word definitions in WordNet
n. a small sebaceous cyst of the eyelid resulting when a Meibomian gland is blocked [syn: Meibomian cyst ]

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Chalazion \Cha*la"zi*on\, n. [NL., fr. Gr. ? dim. of ? hail, pimple.] (Med.) A small circumscribed tumor of the eyelid caused by retention of secretion, and by inflammation of the Melbomian glands.

Wiktionary Word definitions in Wiktionary
n. A cyst in the eyelid, caused by inflammation of a blocked meibomian gland.

Wikipedia Word definitions in Wikipedia
A chalazion (; plural chalazia ), also known as a meibomian gland lipogranuloma , is a cyst in the eyelid that is caused by inflammation of a blocked meibomian gland , usually on the upper eyelid. Chalazia differ from styes (hordeola) in that they are subacute ...