nictitating membrane definition

  • noun:
    • A transparent inner eyelid in wild birds, reptiles, many mammals that closes to guard and dampen a person's eye. Also called third eyelid.
    • a transparent safety fold of skin acting as an inner eyelid in wild birds, reptiles and some mammals
    • a protective fold of skin when you look at the eyes of reptiles and wild birds many mammals
  • verb-intransitive:
    • a thin membrane, present in many pets at the internal direction, or beneath the reduced top, of attention, and with the capacity of becoming drawn across the eyeball; the next eyelid; the haw.

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  • Hyponym for "nictitating membrane"
  • Hypernym for "nictitating membrane"
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