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Any atom, group, or radical substituted for another, or entering a molecule in place of some other part which is removed.

A division of a tribe; a group of genera of a little lower rank than a tribe.

Deviating somewhat from the type of a species, genus, or other group; slightly aberrant.

One of a group of carabid beetles having slender palpi.

y one of a series of compounds analogous to the ketones, and consisting of the sulphuryl group united with two hydrocarbon radicals; as, dimethyl sulphone, (CH.SO

phenyl sulphonic acid, C6H5.SO2.OH, a stable colorless crystalline substance. Sulphonic group (Chem.), the hypothetical radical, SO2.OH, the characteristic residue of sulphonic acids.

A group intermediate between a family and a suborder.

A group intermediate in importance between an order and a subclass.

A board or group of moldings running round a room on a level with the tops of the chair backs. Knight.

ute of complex vocal muscles and are not singing birds, but belong to a widely different group allied to the humming birds.

A group of symptoms occurring together that are characteristic and indicative of some underlying cause, such as a disease.

ng up of complex compounds by special reactions, whereby their component radicals are so grouped that the resulting substances are identical in every respect with the natural articles when such occur; thus, artificial alcohol, urea, indigo blue, alizarin, etc., are made by synthesis.

tself structural or other characters which are usually found only in two or more diverse groups; -- said of species, genera, and higher groups. See the Note under Comprehensive,

A representation of some scene by means of persons grouped in the proper manner, placed in appropriate postures, and remaining silent and motionless.

An artificial group of stony corals including those which have transverse septa in the calicles. The genera Pocillopora and Favosites are examples.

uch as furniture, clothing, household items or bric-a-brac), conducted by one or a small group of individuals, at a location which is not a normal retail establishment.

Any of a group of meteors appearing November 20-23; -- so called because they appear to radiate from a point in Taurus.

A group of young animals, especially of young ducks; a brood; a litter. A team of ducklings about her. Holland.

A group of Hymneoptera comprising the sawflies.

An artificial group of passerine birds having slender bills, as the humming birds.