Definify.com
Webster 1913 Edition
Arum
‖
A′rum
,Noun.
[L.
arum
, aros
, Gr. [GREEK].] A genus of plants found in central Europe and about the Mediterranean, having flowers on a spadix inclosed in a spathe. The cuckoopint of the English is an example.
Our common
arums
– the lords and ladies of village children. Lubbock.
☞ The American “Jack in the pulpit” is now separated from the genus
Arum
. Webster 1828 Edition
Arum
A'RUM
,Noun.
Aurum fulminans, fulminating gold, is gold dissolved in aqua-regia or nitro-muriatic acid, and precipitated by volatile alkali. This precipitate is of a brown yellow, or orange color, and when exposed to a moderate heat, detonizes with considerable noise. It is a compound of the oxyd of gold and ammonia.
Aurum mosaicum, or musivum, a sparkling gold-colored substance, from an amalgam of quick-silver and tin, mixed with sulphur and sal ammoniac, set to sublime. The mercury and part of the sulphur unite into a cinnabar, which sublimes with the salammoniac, and leaves the aurum mosaicum at the bottom. It is a sulphuret of tin, and is used as a pigment.