Stenothermy

Part of speech: noun

Definitions

1. A form of thermoregulation that occurs within a narrow range of temperatures to maintain internal stability
2. The ability of certain organisms to thrive only in specific temperature conditions while struggling outside that range
3. A physiological process that restricts temperature tolerance to a limited degree, influencing habitat and ecological distribution

Etymology: Ancient Greek writers had no word for this idea, because the term is a modern scientific coinage built from two classical roots. "Stenos" meant "narrow" or "confined," and "thermē" meant "heat," so the combination describes a narrow range of heat. The suffix "-y" turns the adjective "stenothermal" into a noun for the quality itself. The term's partner is "eurythermy," from "eurys," meaning "wide." Biologists use these pairs to describe how far an organism can tolerate temperature change. Antarctic icefish, which live in waters barely above freezing, are a standard example of narrow tolerance, while many temperate-zone animals can survive a much wider span. The pair shows that the prefixes do the comparing: "steno-" marks a small range and "eury-" a large one.

Synonyms: narrow temperature tolerance

Antonyms: eurythermy