Defn: A plate heated by hot water contained in a double bottom or jacket. Knight.

WATER POA
Wa"ter po"a. (Bot.)

Defn: Meadow reed grass. See under Reed.

WATER POCKET
Water pocket.

Defn: A water hole in the bed of an intermittent stream, esp. the bowl at the foot of a cliff over which the stream leaps when in the flood stage. [Western U. S.]

WATER POISE
Wa"ter poise`.

Defn: A hydrometer.

WATER PORE
Wa"ter pore`

1. (Zoöl.)

Defn: A pore by which the water tubes of various invertebrates open externally.