Search the Dictionary

A picture taken on a place of prepared glass, in which the lights are represented in silver, and the shades are produced by a dark background visible through the unsilvered portions of the glass.

-- used chiefly as a suffix; as, amic acid; phosphamic acid. Amic acid (Chem.), one of a class of nitrogenized acids somewhat resembling amides.

One of a class of strongly basic substances derived from ammonia by replacement of one or more hydrogen atoms by a basic atom or radical.

Conjoined, or associated with, or making part of the number of; in the number or class of. Blessed art thou among women. Luke i. 28.

ous; esp. a state of being without crystallization even in the minutest particles, as in glass, opal, etc.

One of the classes of vertebrates.

taking of two natures. Not in free and common socage, but in this amphibious subordinate class of villein socage. Blackstone.

A salt of the class formed by the combination of an acid and a base, or by the union of two oxides, two sulphides, selenides, or tellurides, as distinguished from a haloid compound. [R.] Berzelius.

Springing back, as the bottom of an anaclastic glass. Anaclastic glass, a glass or phial, shaped like an inverted funnel, and with a very thin convex bottom. By sucking out a little air, the bottom springs into a concave form with a smart crack; and by breathing or blowing gently into the orifice, the bottom, with a li…

Not changed in form by inversion. Anallagmatic curves, a class of curves of the fourth degree which have certain peculiar relations to circles; -- sometimes called bicircular quartics. -- Anallagmatic surfaces, a certain class of surfaces of the fourth degree.

The process of ascertaining the name of a species, or its place in a system of classification, by means of an analytical table or key. Ultimate, Proximate, Qualitative, Quantitative, and Volumetric analysis. (Chem.) See under Ultimate, Proximate, Qualitative, etc.

Glass gall or sandiver.

One of a class of "fallen angels;" an evil spirit; as, the devil and his angels.

One of a class of compounds which may be regarded as amides in which more or less of the hydrogen has been replaced by phenyl.

uniform temperature. -- Animal spirits. See under Spirit. -- Animal kingdom, the whole class of beings endowed with animal life. It embraces several subkingdoms, and under these there are Classes, Orders, Families, Genera, Species, and sometimes intermediate groupings, all in regular subordination, but variously arra…

To subject to great heat, and then cool slowly, as glass, cast iron, steel, or other metal, for the purpose of rendering it less brittle; to temper; to toughen.

The process used to render glass, iron, etc., less brittle, performed by allowing them to cool very gradually from a high heat.

A class of articulate animals, nearly equivalent to Annelida, including the marine annelids, earthworms, Gephyrea, Gymnotoma, leeches, etc. See Annelida.

A mineral of the feldspar family, commonly occurring in small glassy crystals, also a constituent of some igneous rocks. It is a lime feldspar. See Feldspar.

An ornament of the cymatium of a classic cornice, sometimes pierced for the escape of water.