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daresay
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dark
dark adaptation
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dark adaptation
dark ad·ap·ta·tion or dark a·dap·tion


noun 
Definition:
 
adaptation to darkness: the reflex changes that enable the eye to continue to see in dim light, e.g. dilation of the pupil and increased sensitivity of the retina

dark-a·dapt·ed adjective
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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