ptosis

(to's is) [G. ptosis, a falling.] i. falling or sinking down of any organ. 2. Specifically a drooping of the upper eyelid, due to a fault of development, to paralysis of the le\>at or palpebras muscle, to a weighting of the lid by a tumor, or to rece ion of the supporting eyeball, false p., pseudo ptosis, blepharochalasis.* mom'ing wa'king p., a functional paralysis of the upper lid, occurring temporarily in the anemic or neurotic on awaking, p. adipo'sa, blepharochalasis. p. sympathet'ica. Homer's symptom-complex. vis'ceral p., splanchnoptosia.