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ptosis |
2 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Ptosis \Pto"sis\, n. [NL., fr Gr ? a falling.] (Med.) Drooping of the upper eyelid, produced by paralysis of its levator muscle. From WordNet r 1.6 [wn]: ptosis n : drooping of the upper eyelid caused by muscle paralysis and weakness
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