semester hour(n = noun.act) credit hour - a unit of academic credit; one hour a week for an academic semester;
is a kind of course credit, credit

by the hour, canonical hour, credit hour, early-morning hour, eleventh hour, happy hour, hour, hour angle, hour circle, hour hand, kilometers per hour, kilometres per hour, kilowatt hour, late-night hour, light hour, man hour, miles per hour, person hour, rush hour, semester, sidereal hour, twenty-four hour period, witching hour, zero hour