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andard (Polit. Econ.), a double standard of monetary values; i. e., a gold standard and a silver standard, both of which are made legal tender. -- Double star (Astron.), two stars so near to each other as to be seen separate only by means of a telescope. Such stars may be only optically near to each other, or may be p…

A silver coin among the ancient Greeks, having a different value in different States and at different periods. The average value of the Attic drachma is computed to have been about 19 cents.

A coin, either of gold or silver, of several countries in Europe; originally, one struck in the dominions of a duke.

A silver coin of several countries of Europe, and of different values.

A mineral consisting of antimony and silver.

A genus of shrubs or small trees, having the foliage covered with small silvery scales; oleaster.

A metallic substance compounded of gold and silver; an alloy. [Obs.] Wyclif.

process of chemical decomposition, by the action of electricity; as, the electrolysis of silver or nickel for plating; the electrolysis of water.

Amber; also, the alloy of gold and silver, called electrum.

To plate or cover with a coating of metal, usually silver, nickel, or gold, by means of electrolysis.

The art or process of depositing a coating (commonly) of silver, gold, or nickel on an inferior metal, by means of electricity.

An alloy of gold and silver, of an amber color, used by the ancients.

A mineral consisting of both the chloride and the bromide of silver.

laginous substance. (b) In photography, a liquid preparation of collodion holding salt of silver, used in the photographic process.

mall orthorhombic crystals, also massive. It contains sulphur, arsenic, copper, and often silver.

Being of the same weight. A column of air . . . equiponderant to a column of quicksilver. Locke.

ue of goods or land; to estimate the worth or talents of a person. It is by the weight of silver, and not the name of the piece, that men estimate commodities and exchange them. Locke. It is always very difficult to estimate the age in which you are living. J. C. Shairp.

A metallic mineral, a selenide of copper and silver; -- so called by Berzelius on account of its being found soon after the discovery of the metal selenium.

Capable of being extended. [Obs.] Silver beaters choose the finest coin, as that which is most extensive under the hammer. Boyle.

lor, or brightness; grown dim. "His faded cheek." Milton. Where the faded moon Made a dim silver twilight. Keats.