third eyelid

third eyelid

* * *

nictitating membrane.

Medical dictionary. 2011.

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Look at other dictionaries:

  • third eyelid — n. NICTITATING MEMBRANE * * * …   Universalium

  • third eyelid — n. NICTITATING MEMBRANE …   English World dictionary

  • third eyelid — third′ eye′lid n. zool. nictitating membrane …   From formal English to slang

  • third eyelid. — See nictitating membrane. * * * …   Universalium

  • third eyelid — noun informal term for nictitating membrane …   English new terms dictionary

  • third eyelid — noun a protective fold of skin in the eyes of reptiles and birds and some mammals • Syn: ↑nictitating membrane • Hypernyms: ↑protective fold • Hyponyms: ↑haw • Part Holonyms: ↑eye, ↑ …   Useful english dictionary

  • third eyelid. — See nictitating membrane …   Useful english dictionary

  • Third cranial nerve — Nerve, third cranial: The third cranial nerve is the oculomotor nerve. The cranial nerves emerge from or enter the skull (the cranium), as opposed to the spinal nerves which emerge from the vertebral column. There are twelve cranial nerves. The… …   Medical dictionary

  • eyelid — /uy lid /, n. the movable lid of skin that serves to cover and uncover the eyeball. [1200 50; ME; see EYE, LID] * * * ▪ anatomy       movable tissue, consisting primarily of skin and muscle, that shields and protects the eyeball from mechanical… …   Universalium

  • eyelid — One of the two movable folds covering the front of the eyeball when closed; formed of a fibrous core (tarsal plate) and the palpebral portions of the orbicularis oculi muscle covered with skin on the …   Medical dictionary

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