mesophile

[mez-uh-fahyl, -fil, mes-, mee-zuh-, -suh-]Bacteriology
noun
  1. a mesophilic bacterium.

Origin of mesophile

First recorded in 1925–30; meso- + -phile
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018