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A part of a thing made by subdividing. In the decimal table, the subdivision of the cubit, as span, palm, and digit, are deduced from the shorter cubit. Arbuthnot.

[From the Allegheny River, Pennsylvania.] (Geol.) Pertaining to or designating a subdivision of the Pennsylvanian coal measure.

ody formed of numerous rings or annular segments, and without jointed legs. The principal subdivisions are the Chætopoda, including the Oligochæta or earthworms and Polychæta or marine worms; and the Hirudinea or leeches. See Chætopoda.

A subdivision of a department. [France]

One of the subdivisions of the Brachiopoda, including those that have the shells united by a hinge.

One of the parts intercepted between the joints; also, a subdivision into parts at regular or irregular intervals as a result of serial intermission in growth, as in the cane, grasses, etc. Lindley.

A large subdivision of fungi coördinate with the Ascomycetes, characterized by having the spores borne on a basidium. It embraces those fungi best known to the public, such as mushrooms, toadstools, etc.

Divided into two parts almost to the base, as a leaf; consisting of two parts or subdivisions. Gray.

A part or subdivision of a treatise or literary work; as, the tenth book of "Paradise Lost."

Any member or part of a body or system; a distinct article; a section or subdivision; a department. "Branches of knowledge." Prescott. It is a branch and parcel of mine oath. Shak.

The bronchial tubes which arise from the branching of the trachea, esp. the subdivision of the bronchi. Dunglison.

One of the subdivisions of the trachea or windpipe; esp. one of the two primary divisions.

Of or pertaining to the lowest subdivision of the rocks of the Silurian or Molluscan age; -- sometimes described as inferior to the Silurian. It is named from its development in Cambria or Wales. See the Diagram under Geology.

A native or inhabitant of Canada. Canadian period (Geol.), A subdivision of the American Lower Silurian system embracing the calciferous, Quebec, and Chazy epochs. This period immediately follows the primordial or Cambrian period, and is by many geologists regarded as the beginning of the Silurian age, See the Diagram,…

of the twenty-two independent states which form the Swiss federal republic; in France, a subdivision of an arrondissement. See Arrondissement.

The closing subdivision of the Devonian age in America. The rocks of this period are well developed in the Catskill mountains, and extend south and west under the Carboniferous formation. See the Diagram under Geology.

A subdivision of the Quaternary age immediately following the Glacial period; -- so named from beds near Lake Champlain.

uent atoms. These atoms are not assumed to be indivisible, but merely the finest grade of subdivision hitherto attained. Chemistry deals with the changes in the composition and constitution of molecules. See Atom, Molecule.

A subdivision in the upper part of the Devonian system in America, so named from the Chemung River, along which the rocks are well developed. It includes the Portage and Chemung groups or epochs. See the Diagram under Geology.

A subordinate portion or a subdivision of a sentence containing a subject and its predicate.