GRAVITY n.
andard 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.
GREGORIAN a.
ind it. -- Gregorian year, the year as now reckoned according to the Gregorian calendar. Thus, every year, of the current reckoning, which is divisible by 4, except those divisible by 100 aud not by 400, has 366 days; all other years have 365 days. See Bissextile, and Note under Style, n., 7.