This word is acceptable for play in the UK dictionary that is being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. of, or relating to a mesophile

adj. living and thriving at moderate temperatures

Preferring, or adapted to live under, a condition of medium temperature or moisture; mesophilous: noting especially bacteria which grow beat in cultures which are maintained at a medium temperature (15–45° C.).

"Tommy -- Queso Fresco uses rennet and mesophilic culture and ends up a cheese you can melt, similar to mozzarella."

mesophilic bacteria   

nitrogen-fixing    weight-bearing    acid-fast    facultative    main sequence