eyelid

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Related to eyelid drooping: myasthenia gravis

eyelid

1. either of the two muscular folds of skin that can be moved to cover the exposed portion of the eyeball
2. Aeronautics a set of movable parts at the rear of a jet engine that redirect the exhaust flow to assist braking during landing

eyelid

[′ī‚lid]
(anatomy)
A movable, protective section of skin that covers and uncovers the eyeball of many terrestrial animals.