semester
se.mes.ter or se.mes.tri.al \s*-'mes-t*r\ \-tr*l\ \-tre--*l\ n [G, fr. L semestris half-yearly, fr. sex six + mensis month -m more at SIX, MOON 1: a period of six months 2: either of the two usu. 18-week periods of instruction into which an acad emic year is usu. divided - se.mes.tra.l aj