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Having a toothed bill; -- applied to a group of passerine birds, having the bill notched, and feeding chiefly on insects, as the shrikes and vireos. See Illust. (N) under Beak.

A group of nudibranch mollusks without special gills.

A group of lemuroid mammals having a parachutelike web of skin between the fore and hind legs, of which the colugo (Galeopithecus) is the type. See Colugo.

A group of fishlike animals including the Marsipobranchiata and Leptocardia.

To distribute into parts, groups, or classes; to mark off; to class. [Obs.] Passed through the land, and described it by cities into seven parts in a book. Josh. xviii. 9.

A microscopic plant of the family Desmidiæ, a group of unicellular algæ in which the species have a greenish color, and the cells generally appear as if they consisted of two coalescing halves.

A member of a group of South American blood-sucking bats, of the genera Desmodus and Diphylla. See Vampire.

Having the maxillo-palatine bones united; -- applied to a group of carinate birds (Desmognathæ), including various wading and swimming birds, as the ducks and herons, and also raptorial and other kinds.

numerous invertebrates, the bony portions of many large and remarkable fishes of extinct groups. See the Diagram under Geology.

denoting two atoms, radicals, groups, or equivalents, as the case may be. See Bi-,

having the stamens united into two bodies by their filaments (said of a plant or flower); grouped into two bundles or sets by coalescence of the filaments (said of stamens).

Any compound containing two amido groups united with one or more acid or negative radicals, -- as distinguished from a diamine. Cf. Amido acid, under Amido, and Acid amide, under Amide.

A compound containing two amido groups united with one or more basic or positive radicals, -- as contrasted with a diamide.

A pointed projection, like a four-sided pyramid, used for ornament in lines or groups.

of a cell, when, during cell division, the loops of the nuclear network separate into two groups, preparatory to the formation of two daughter nuclei. See Karyokinesis.

A compound of a binary type containing two cyanogen groups or radicals; -- called also bicyanide.

One of a group of extinct reptiles having the jaws armed with a horny beak, as in turtles, and in the genus Dicynodon, supporting also a pair of powerful tusks. Their remains are found in triassic strata of South Africa and India.

d with a false membrane, produced by the solidification of an inflammatory exudation. Cf. Group.

A group of spiders having only two lunglike organs. [Written also Dipneumones.]

A group of ganoid fishes, including the living genera Ceratodus and Lepidosiren, which present the closest approximation to the Amphibia. The air bladder acts as a lung, and the nostrils open inside the mouth. See Ceratodus, and Illustration in Appendix.