Trimester
[traɪ'mestə] or [traɪ'mɛstɚ]
Definition
(noun.) one of three divisions of an academic year.
(noun.) a period of three months; especially one of the three three-month periods into which human pregnancy is divided.
Edited by Gail--From WordNet
Definition
(n.) A term or period of three months.
Checked by Clifton