wa|ter|glass

wa|ter|glass
water glass, or wa|ter|glass «WT uhr GLAS, -GLAHS; WOT-», noun.
1. a) a glass to hold water; tumbler. b) Obsolete. a glass finger bowl.
2. an aqueous, jellylike, or powdery compound of sodium, silicon, and oxygen that solidifies when exposed to the air, used especially in soaps, in preserving eggs and wood, in cement manufacture, and in fireproofing wood, cloth, and paper; sodium silicate; soluble glass: »

Water glass is [also] used in the purification of fats and oils, in refining petroleum and in the manufacture of silica gel (George L. Bush).

3. an instrument for making observations beneath the surface of water, consisting of an open box or tube with a glass bottom.
4. = water clock. (Cf.water clock)
5. = water gauge. (Cf.water gauge)

Useful english dictionary. 2012.

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