from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Abnormal lowering or drooping of an organ or a part, especially a drooping of the upper eyelid caused by muscle weakness or paralysis.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The prolapse of a bodily organ, especially drooping of the eyelid.

from the GNU version of the Collaborative International Dictionary of English

  • n. Drooping of the upper eyelid, produced by paralysis of its levator muscle.

from The Century Dictionary and Cyclopedia

  • A falling of the upper eyelid, or inability to raise it, due to paralysis of the levator palpebræ.
  • n. A falling down or prolapse of any of the abdominal viscera. Also called Glenard's disease and enteroptosis.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. drooping of the upper eyelid caused by muscle paralysis and weakness


from The American Heritage® Dictionary of the English Language, 4th Edition

Greek ptōsis, fall, from piptein, ptō-, to fall; see pet- in Indo-European roots.

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Ancient Greek πτωσις ("falling, a fall").


  • "The thing you're going to really see, with people doing their own Botox, you're gonna see a lot of uneven eyebrows and you're gonna see a lot of what we call ptosis, where the eyelids drop."

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  • The first was meant to fix a congenital condition known as ptosis, where the muscles are not strong enough to hold up the lid, thus creating a droopy eyelid.

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  • Some children are born with a weakened muscle of the eyelid called a ptosis that results in a drooping of the eyelid.


  • Breast droop, called ptosis, can be corrected by mastopexy. breast reduction.

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  • Projects based at the Hospital include clinical investigations into the epidemiology of myopia and eye growth, eye trauma and retinal injury, pediatric glaucomas, epidemiology and imaging in retinopathy of prematurity, genetic investigations in myopia and anophthalmia, and congenital ptosis.

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  • Tuite and Ruas determined that the postoperative infection that had occurred in New York had left Jorge Luis with cranial defects on the forehead, as well as ptosis—an abnormally low position of the upper eyelid—that would also require repair.

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  • A more serious complication of Botox injections can be ptosis, when the eyebrow and eyelid droop.

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  • Experienced dermatologists are aware of the ptosis possibilities and stay away from those muscles, which is another good reason to have Botox done only by an experienced medical professional. q&a

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  • a. spec. Drooping of the upper eyelid from paralysis of the elevator muscle.

    b. Prolapsus of any of the viscera or of the breasts.

    February 3, 2007