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A group of fishes including the sharks and rays; the Elasmobranchii; -- called also Placoidei.

A flat molding, or group of moldings, the width of which much exceeds its projection, as the face of an architrave.

the luminous medium is platinum. See under Incandescent. -- Platinum metals (Chem.), the group of metallic elements which in their chemical and physical properties resemble platinum. These consist of the light platinum group, viz., rhodium, ruthenium, and palladium, whose specific gravities are about 12; and the heavy…

A group of small stars in the neck of the constellation Taurus. Job xxxviii. 31.

A group of fresh-water turtles in which the neck can not be retracted, but is bent to one side, for protection. The matamata is an example.

A group of Isectivora, including the colugo.

A feather, or group of feathers, worn as an ornament; a waving ornament of hair, or other material resembling feathers. His high plume, that nodded o'er his head. Dryden.

A knot; a cluster; a group; a crowd; a flock; as, a plump of trees, fowls, or spears. [Obs.] To visit islands and the plumps of men. Chapman.

Originally, an artificial group including many parasitic Entomostraca, together with the horseshoe crabs (Limuloidea).

A group of herbivorous marsupials including the kangaroos and their allies. -- Po*eph"a*gous, a.

the divisions of a composition, or the pauses to be observed in reading, or to point off groups of figures, etc.; a stop, as a comma, a semicolon, and esp. a period; hence, figuratively, an end, or conclusion. And there a point, for ended is my tale. Chaucer. Commas and points they set exactly right. Pope.…

One of the two principal groups of Chætopoda. It includes those that have prominent parapodia and fascicles of setæ. See Illust. under Parapodia.

In the broadest sense, the theory or practice of any of several groups of recent painters, or of these groups taken collectively, whose work and theories have in common a tendency to reaction against the scientific and naturalistic character of impressionism and neo- impressionism. In a strict sense the term post-impre…

A river tortoise; one of a group of tortoises (Potamites, or Trionychoidea) having a soft shell, webbed feet, and a sharp beak. See Trionyx.

a bright-colored American warbler (Dendroica discolor). The back is olive yellow, with a group of reddish spots in the middle; the under parts and the parts around the eyes are bright yellow; the sides of the throat and spots along the sides, black; three outer tail feathers partly white. -- Prairie wolf. (Zoöl.) See…

The leading woman of a group, esp. in a theatrical cast.

bstitution or replacement. Primary alcohol (Organic Chem.), any alcohol which possess the group CH2.OH, and can be oxidized so as to form a corresponding aldehyde and acid having the same number of carbon atoms; -- distinguished from secondary and tertiary alcohols. -- Primary amine (Chem.), an amine containing the am…

moths of the genus Procris. The larvæ of some species injure the grapevine by feeding in groups upon the leaves.

A comprehensive group of mankind, including those that have prognathous jaws.

hydrolytic action of boiling dilute acids on proteids. Proteoses are divided into the two groups, the primary and secondary proteoses.