Cold-blooded Cold"-blood`ed, a. 1. Having cold blood; -- said of fish or animals whose blood is but little warmer than the water or air about them. [1913 Webster]

2. Deficient in sensibility or feeling; hard-hearted. [1913 Webster]

3. Not thoroughbred; -- said of animals, as horses, which are derived from the common stock of a country. [1913 Webster]

The Collaborative International Dictionary of English. 2000.