WHITE RATS

white rat

noun
an albino variety of the Norway rat, Rattus norvegicus, used in biological experiments.
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Collins
World English Dictionary
white rat
 
n
a white variety of the brown rat (Rattus norvegicus), used extensively in scientific research

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

white rat n.
A domesticated albino variety of the Norway rat, used extensively in laboratory experiments.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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