Source : Webster's Revised Unabridged Dictionary (1913)

Gastritis \Gas*tri"tis\, n. [NL., from. Gr. ?, ?, stomach +
   -itis.] (Med.)
   Inflammation of the stomach, esp. of its mucuos membrane.

Source : WordNet®

gastritis
     n : inflammation of the lining of the stomach; nausea and loss
         of appetite and discomfort after eating