What does thermophile mean?
A thermophile is an organism that thrives at high temperatures. The term is especially common in microbiology, molecular biology, and the study of organisms living in hot springs, volcanic soils, and deep-sea hydrothermal vents. Unlike an organism that merely survives extreme heat, a thermophile is physiologically adapted to high temperatures and often grows best under them. Its name combines a prefix meaning heat with a suffix meaning loving, reflecting its special affinity for hot environments. Thermophiles are scientifically important because their cellular machinery can remain functional at temperatures that would damage most organisms. Enzymes obtained from these organisms have also proved valuable in laboratory techniques that involve repeated cycles of heating and cooling. In ordinary conversation, the word is uncommon and should normally be understood as a biological term rather than used loosely for anything that prefers warmth.
nounAn organism, especially a bacterium or archaeon, that is adapted to life at high temperatures and grows optimally under such conditions.
- An organism, especially a bacterium or archaeon, that thrives at high temperatures and is adapted to life in hot environments.
"The researchers discovered a previously unknown thermophile in the hot spring."
"The sample contained a thermophile capable of growing at temperatures that would kill most organisms."
"Because it is a thermophile, the microbe thrives in the hydrothermal vents of the deep ocean."
The plural refers to two or more organisms adapted to high temperatures.
"Different thermophiles dominate the microbial communities of geothermal pools."
Hot springs have given scientists some of biology's most useful helpers, including a heat-loving bacterium whose DNA-building enzyme works through repeated heating.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of thermophile
Thermophile was formed in modern scientific English from the combining form thermo-, ultimately related to Greek thermē, meaning heat, and -phile, from Greek philos, meaning loving. The resulting term follows a productive English pattern for naming organisms by their environmental preferences. Its modern development reflects the growth of microbiology and the identification of specialized life in geothermal habitats.
Related word forms
How thermophile is actually used
This is primarily a technical biological term and is normally countable. It may also appear attributively in scientific labels such as thermophile species.
Easily confused with thermophile
A thermophile is the organism itself, whereas thermophilic is the adjective describing an organism or material adapted to high temperatures.