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Also available:
World English Dictionary
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nictitating membrane
nic·ti·tat·ing mem·brane
(
plural
nic·ti·tat·ing mem·branes
)
noun
Definition:
inner eyelid:
a thin transparent layer of skin underneath the eyelid that can cover the eye surface of birds, reptiles, and some mammals to moisten and protect it
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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