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Extreme Games
extreme sport
extreme unction
extremely
extremely high frequency
extremely low frequency
extremism
extremity
extremophile
extricate
extrinsic
extro-
extrorse
extroversion
extrovert
extrude
extrusion
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extremophile

ex·trem·o·phile [ ik strm ə fl ]


noun 
Definition:
 
organism that lives in extreme environment: an organism, especially a microorganism, that thrives in climatic or environmental extremes such as the intense heat of a boiling sulfur pool or the intense cold of Arctic permafrost

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