heavy water

water whose molecules consist of two heavy hydrogen atoms and one ordinary oxygen atom 重水.

heatedly, heater, heath, Heath Robinson, heathen, heathenish, heather, heating, heatwave, heave, heaven, heaven-sent, heavenly, heavenward, heavily, heaviness, Heaviside layer, heavy, heavy hydrogen, heavy industry, heavy-duty, heavy-handed, heavy-handedly, heavy-handedness, heavy-hearted, heavy-laden, heavyweight, Hebraic, Hebrew, heck, heckle, heckler, hect(o)-, hectare, hectic, hectically, hectogram, hector, hedge, hedge-hop,