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A division or part; a canto; as, the passus of Piers Plowman. See 2d Fit.

An extensive division of ruminants, including the antelopes, deer, and cattle.

Having very narrow, close divisions, in arrangement and regularity resembling those of a comb; comblike; as, a pectinate leaf; pectinated muscles. See Illust. (e) of Antennæ.

A division of Gastropoda, including those that have a comblike gill upon the neck.

A stalk which supports one flower or fruit, whether solitary or one of many ultimate divisions of a common peduncle. See Peduncle, and Illust. of Flower.

A division of parasitic hemipterous insects, including the true lice. See Illust. in Appendix.

A division of marsupials, including the opossums.

A division of Arachnida, including the whip scorpions (Thelyphonus) and allied forms. Sometimes used in a wider sense to include also the true scorpions.

A division of Cirripedia, including the stalked or goose barnacles.

A division of Nudibranchiata, in which the mantle itself serves as a gill.

A division of alcyonoid corals, including the seapens and related kinds. They are able to move about by means of the hollow muscular peduncle, which also serves to support them upright in the mud. See Pennatula, and Illust. under Alcyonaria.

An extensive division of Coleoptera, including those that normally have five-jointed tarsi. It embraces about half of all the known species of the Coleoptera.

A division of fishes including the perches and related kinds.

A division of corals including those that have a porous texture, as Porites and Madrepora; -- opposed to Aporosa.

curring phenomenon, as by the completion of a revolution of one of the heavenly bodies; a division of time, as a series of years, months, or days, in which something is completed, and ready to recommence and go on in the same order; as, the period of the sun, or the earth, or a comet.

Of or pertaining to a period or periods, or to division by periods. The periodicaltimes of all the satellites. Sir J. Herschel.

A division of ungulate mammals, including those that have an odd number of toes, as the horse, tapir, and rhinoceros; -- opposed to Artiodactyla.

A division of ciliated Infusoria having a circle of cilia around the oral disk and sometimes another around the body. It includes the vorticellas. See Vorticella.

Having the whole or part of the perianth petaline. Petaloideous division, that division of endogenous plants in which the perianth is wholly or partly petaline, embracing the Liliaceæ, Orchidaceæ, Amaryllideæ, etc.

A division of Arachnoidea, including the daddy longlegs or harvestman (Phalangium) and many similar kinds. They have long, slender, many-jointed legs; usually a rounded, segmented abdomen; and chelate jaws. They breathe by tracheæ. Called also Phalangides, Phalangidea, Phalangiida, and Opilionea.