third trimester(n = noun.time) - time period extending from the 28th week of gestation until delivery;
is a kind of trimester
first trimester, kepler's third law, newton's third law, newton's third law of motion, second trimester, third, third baron rayleigh, third base, third baseman, third battle of ypres, third class, third council of constantinople, third cranial nerve, third crusade, third deck, third degree, third dimension, third epistel of john, third estate, third eye, third eyelid, third gear, third house, third lateran council, third law of motion, third law of thermodynamics, third party, third period, third person, third power, third rail, third rate, third reich, third sacker, third stomach, third string, third tonsil, third ventricle, third world, trimester