Meaning of trimester

tri•mes•ter

Pronunciation: (trī-mes'tur, trī'mes-), [key]
— n.
  1. a term or period of three months.
  2. one of the three approximately equal terms into which the year is divided by some colleges, schools, etc.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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