01 a. Having cold blood; -- said of fish or animals whose blood is but little warmer than the water or air about them.
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1.
Having cold blood; -- said of fish or animals whose blood is but little warmer than the water or air about them.
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2.
Deficient in sensibility or feeling; hard-hearted.
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3.
Not thoroughbred; -- said of animals, as horses, which are derived from the common stock of a country.