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 Definitions of ptosis  [-siz]  

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Definition of 'ptosis' Random House Webster's College Dictionary 

1. (n.) ptosis
prolapse or drooping of an organ or part, esp. a drooping of the upper eyelid.

Etymology:  (1735–45; < NL < Gk ptṒsis a falling)

Definition of 'ptosis' Princeton's WordNet 

1. (noun) ptosis
drooping of the upper eyelid caused by muscle paralysis and weakness
Definition of 'ptosis' Webster Dictionary 

1. (noun) ptosis
drooping of the upper eyelid, produced by paralysis of its levator muscle

'ptosis' - Nearby Entries  

ptomain  ptomaine  ptomaine poisoning  ptosis  ptsd  ptyalin  ptyalise  



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