Drooping of the upper eyelid caused by muscle paralysis and weakness

• Eyelid ailment

Wikipedia Word definitions in Wikipedia
Female breast ptosis or sagging is a natural consequence of aging . The rate at which a woman's breasts droop and the degree of ptosis depends on many factors. The key factors influencing breast ptosis over a woman's lifetime are cigarette smoking, her ...

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Ptosis \Pto"sis\, n. [NL., fr. Gr. ? a falling.] (Med.) Drooping of the upper eyelid, produced by paralysis of its levator muscle.

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1743, from Greek ptosis , literally "falling, a fall," also "the case of a noun," nominal derivative of piptein "to fall" (see symptom ). In English, especially of the eyelid. Related: Ptotic .

Wiktionary Word definitions in Wiktionary
n. The prolapse of a bodily organ, especially drooping of the eyelid or the breasts.

WordNet Word definitions in WordNet
n. drooping of the upper eyelid caused by muscle paralysis and weakness [also: ptoses (pl)]