hyperthermophile
noun
hy·per·ther·mo·phile ˌhī-pər-ˈthər-mə-ˌfī(-ə)l 
: an organism that lives in extremely hot environments (such as hot springs) with temperatures around the boiling point of water
hyperthermophilic
ˌhī-pər-ˌthər-mə-ˈfi-lik
adjective 
Example Sentences
Recent Examples on the Web Here’s a bacterium whose genetic material includes genes from a diverse bestiary: Icelandic hyperthermophiles, petunias, yeast, perhaps a bit of bioluminescent jellyfish. 
Sophia Roosth, Slate Magazine, 25 Apr. 2017
Sophia Roosth, Slate Magazine, 25 Apr. 2017 Word History
First Known Use
1988, in the meaning defined above
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