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nidus
niece
niello
nielsbohrium
nieve
nieve penitente
NIF
nifedipine
niff
nifty
Nig.
nigella
Niger
Niger-Congo
Nigeria
Nigerian English
niggard
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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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