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An epithet applied to editions (chiefly of the classics) which proceeded from the press of Aldus Manitius, and his family, of Venice, for the most part in the 16th century and known by the sign of the anchor and the dolphin. The term has also been applied to certain elegant editions of English works.…

A kind of seaweed; pl. the class of cellular cryptogamic plants which includes the black, red, and green seaweeds, as kelp, dulse, sea lettuce, also marine and fresh water confervæ, etc.

One of a class of caustic bases, such as soda, potash, ammoma, and lithia, whose distinguishing peculiarities are solubility in alcohol and water, uniting with oils and fats to form soap, neutralizing and forming salts with acids, turning to brown several vegetable yellows, and changing reddened litmus to blue. Fixed a…

y soda with a smaller amount of potash, and usually a little lime and magnesia. Two main classes of alkali are commonly distinguished: black alkali, which may be any alkaline carbonate, but which practically consists of sodium carbonate (sal soda), which is highly corrosive and destructive to vegetation; and white alk…

An organic base, especially one of a class of substances occurring ready formed in the tissues of plants and the bodies of animals.

A genus of succulent plants, some classed as trees, others as shrubs, but the greater number having the habit and appearance of evergreen herbaceous plants; from some of which are prepared articles for medicine and the arts. They are natives of warm countries.

-- 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.

One of the classes of vertebrates.

rtaking 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.

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.

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 arr…

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

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

The class of the Coelenterata which includes the corals and sea anemones. The three principal groups or orders are Acyonaria, Actinaria, and Madreporaria.