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Meaning of mesophilic

mes•o•phil•ic

Pronunciation: (mez"u-fil'ik, mes"-, mē"zu-, -su-), [key]
— adj.
  1. (of bacteria) growing best at moderate temperatures, between 25°C and 40°C.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.