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white noise
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white out
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white pine blister rust
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white matter
white mat·ter


noun 
Definition:
 
nerve tissue: the whitish nerve tissue of the brain and spinal cord, consisting mostly of myelinated nerve fibers.
See also  gray 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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