Defn: A venomous North American snake (Ancistrodon piscivorus) allied to the rattlesnake but destitute of a rattle. It lives in or about pools and ponds, and feeds largely of fishes. Called also water snake, water adder, water viper.

WATER MOLE Wa"ter mole`. (Zoöl.) (a) The shrew mole. See under Shrew. (b) The duck mole. See under Duck.

WATER MONITOR
Wa"ter mon"i*tor. (Zoöl.)

Defn: A very large lizard (Varanaus salvator) native of India. It frequents the borders of streams and swims actively. It becomes five or six feet long. Called also two-banded monitor, and kabaragoya. The name is also applied to other aquatic monitors.

WATER MONKEY
Water monkey.

Defn: A jar or bottle, as of porous earthenware, in which water is cooled by evaporation.

WATER MOTOR
Wa"ter mo"tor.

1. A water engine.

2. A water wheel; especially, a small water wheel driven by water from a street main.

WATER MOUSE
Wa"ter mouse`. (Zoöl.)