(show jumping, athletics) A (usually rectangular) pool of water intended to be an obstacle to be jumped.

a device that purifies water

A semi-aquatic venomous snake native to the southeastern United States, Agkistrodon piscivorus

plural of water moccasin

plural of water organ

Any insect in the family Hydrometridae, aquatic insects related to the water strider

plural of water measurer

A telescope in which the medium between the objective and the eyepiece is water instead of air, used in some experiments involving aberration. / A telescope devised for looking into a body of water.

plural of water telescope

(historical) A drink made with various herbs, supposed to ward off the plague.