mesophile
noun
me·so·phile
| \ ˈmez-ə-ˌfīl
, ˈmēz-
, ˈmēs-, ˈmes-\
, ˈmēz-
, ˈmēs-, ˈmes-\
variants:
also mesophil \ -ˌfil
\
\
Medical Definition of mesophile
: an organism growing at a moderate temperature (as bacteria that grow best at about the temperature of the human body) — compare psychrophile, thermophile