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gray whale
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gray matter
gray mat·ter


noun 
Definition:
 
1. intelligence: intelligence or brains ( informal )

2. brownish-gray tissue within brain: brownish gray nerve tissue consisting mainly of nerve cell bodies within the brain and spinal cord.
See also  white matter
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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