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ptosis Line breaks: pto¦sis
Pronunciation: /ˈtəʊsɪs/

Definition of ptosis in English:


[mass noun] Medicine
Drooping of the upper eyelid due to paralysis or disease, or as a congenital condition.
Example sentences
  • The first sign frequently presents as ocular muscle weakness resulting in diploplia (double vision) and/or ptosis (drooping eyelid).
  • Symptoms include nasal congestion, ptosis of one eyelid, miosis, and conjunctional hyperemia.
  • On physical examination, slight proptosis of the left eye and ptosis of the left upper eyelid were noted.


Pronunciation: /ˈtəʊtɪk/
Example sentences
  • Occasionally, the small volume of TRAM tissue cannot fulfill the requirements for breast symmetry, especially in those patients with limited abdominal tissue and large ptotic breasts.
  • This flap also permits large ptotic breasts to be reconstructed without recourse to breast implants.
  • In older patients, these glands may become ptotic and appear more prominent.


Mid 18th century: from Greek ptōsis, from piptein 'to fall'.

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