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A minor subdivision at the base of the Cambrian system in Wales.

A separate part, or topic, of a discourse; a theme to be expanded; a subdivision; as, the heads of a sermon.

telescope lying parallel to the plane of the earth's equator, and graduated in hours and subdivisions of hours of right ascension. (c) A small brass circle attached to the north pole of an artificial globe, and divided into twenty-four parts or hours. It is used to mark differences of time in working problems on the g…

An administrative subdivision of a fu, or department, or of an independent chow; also, the seat of government of such a district.

nce; person; personality; -- used by the early theologians to denote any one of the three subdivisions of the Godhead, the Father, Son, and Holy Spirit.

Below a trochlea, or pulley; -- applied esp. to one of the subdivisions of the trigeminal nerve.

A single piece or subdivision of a series, or of a number of long pieces which may be connected together; as, a length of pipe; a length of fence.

A long tape, or a narrow ribbon of steel, etc., marked with subdivisions, as feet and inches, for measuring; a tapeline.

A small lobe; a subdivision of a lobe. Lobule of the ear. (Anat.) Same as Lobe of the ear.

A little lobule, or subdivision of a lobule.

A subdivision of the British Upper Silurian lying below the Old Red Sandstone; -- so named from the Ludlow, in Western England. See the Chart of Geology.

A subdivision of decapod Crustacea, having the abdomen largely developed. It includes the lobster, prawn, shrimp, and many similar forms. Cf. Decapoda.

A subdivision of the Niagara period in the American upper Silurian, characterized by the formations known as the Oneida conglomerate, and the Medina sandstone. See the Chart of Geology.

A subdivision or the American Upper Silurian system, embracing the Medina, Clinton, and Niagara epoch. The rocks of the Niagara epoch, mostly limestones, are extensively distributed, and at Niagara Falls consist of about eighty feet of shale supporting a greater thickness of limestone, which is gradually undermined by…

A subdivision of Cetacea, including the sperm whale, dolphins, etc.; the toothed whales.

ly limestone, characteristic of the latest period of the Silurian age. Oriskany period, a subdivision of the American Paleozoic system intermediate or translational in character between the Silurian and Devonian ages. See Chart of Geology.

In irrigating, a subdivision of an irrigated surface between a feeder and an outlet drain.

A distinct part of a discourse or writing; any section or subdivision of a writing or chapter which relates to a particular point, whether consisting of one or many sentences. The division is sometimes noted by the mark

Among Trinitarians, one of the three subdivisions of the Godhead (the Father, the Son, and the Holy Ghost); an hypostasis. "Three persons and one God." Bk. of Com. Prayer.

A subdivision of a phyle, or tribe, in Athens.