noun see: six Date: 1827 either of the two usually 18-week periods of instruction into which an academic year is often divided, a period of six months, semestral or semestrial adjective
SEMESTER
Meaning of SEMESTER in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012