Etymology of the English word trimester
the English word
trimesterderived from the French word
trimestrederived from the Latin word
trimestris (three months old; lasting, acting for 3 months)
derived from the Latin word
mensis (month)
derived from the Proto-Indo-European root
*me-using the Latin prefix
tri-derived from the Classical Latin word
tres (three)
derived from the Proto-Indo-European root
*trei-Date
The earliest known usage of trimester in English dates from the 19th century.
Usage
Word found in Modern English
