Center of gravity See under Center. -- Gravity battery, See Battery,
n., 4. -- Specific gravity, the ratio of the weight of a body to the
weight of an equal volume of some other body taken as the standard or
unit. This standard is usually water for solids and liquids, and air
for gases. Thus, 19, the specific gravity of gold, expresses the fact
that, bulk for bulk, gold is nineteen times as heavy as water.
Gra"vy (?), n.; pl. Gravies (#). [OE. greavie; prob. fr. greaves,
graves, the sediment of melted tallow. See Greaves.] 1. The juice or
other liquid matter that drips from flesh in cooking, made into a
dressing for the food when served up.