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homothermany warm-blooded animal (mammal or bird). A homoiotherm can maintain its body temperature within a narrow range, usually above that of its surroundings (see CORE TEMPERATURE despite large variation in environmental temperature. It may be maintained continually or for limited periods only. Compare POIKILOTHERM.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005