Homothermy

Part of speech: noun

Definitions

1. The condition of maintaining a constant internal body temperature regardless of external environmental changes, often seen in mammals and birds
2. The physiological state in which an individual's body temperature remains stable despite fluctuations in ambient temperature, characteristic of species like mammals
3. A biological adaptation that enables an organism to regulate its internal temperature to remain relatively constant, independent of external conditions

Etymology: Homothermy is a compound built from two Greek elements: "homos", meaning "same", and "thermē", meaning "heat". Put together, it describes an animal that keeps the same body temperature whatever the weather. The pairing is a modern scientific coinage rather than an ancient word, assembled from classical roots by biologists who needed a precise label for this physiology. The term sits in deliberate contrast with "poikilothermy", the state of animals whose body temperature drifts with their surroundings, such as most reptiles, amphibians, and fish. The two words share a logic: "poikilos" means "varied" or "mottled" in Greek, so one describes a body that varies and the other a body that stays constant.

Synonyms: warm-bloodedness, endothermy, homeothermy

Antonyms: poikilothermy, cold-bloodedness, ectothermy