extremophile
A microorganism that lives and thrives in physically or geochemically extreme conditions, such as high temperature, high salinity, or high acidity.
Extremophiles inhabit environments such as high-temperature hot springs and deep-sea hydrothermal vents.
In this study, a new species of extremophile was discovered in the Antarctic ice sheet.
Compound of 極限 (extreme, limit), 環境 (environment), and 微生物 (microorganism). A calque of English 'extremophile'.