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Webster 1913 Edition

Trimestrial

Tri-mes′tri-al

,

Adj.

Of or pertaining to a trimester, or period of three months; occurring once in every three months; quarterly.

Definition 2024

trimestrial

trimestrial

English

Adjective

trimestrial ‎(not comparable)

Of or pertaining to a trimester, or period of three months.
Occurring once every three months; quarterly.