Alabama Period :: Alabama period () A period in the American eocene, the lowest in the tertiary age except the lignitic..

Antiperiodic :: Antiperiodic (n.) A remedy possessing the property of preventing the return of periodic paroxysms, or exacerbations, of disease, as in intermittent fevers..

Catskill Period :: Catskill period () 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..

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

Chemung Period :: Chemung period () 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..

Hamilton Period :: Hamilton period () A subdivision of the Devonian system of America; -- so named from Hamilton, Madison Co., New York. It includes the Marcellus, Hamilton, and Genesee epochs or groups. See the Chart of Geology..

Niagara Period :: Niagara period () 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 the removal of the shale. See Chart of Geology..

Period :: Period (n.) A portion of time as limited and determined by some recurring 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..

Period :: Period (n.) A stated and recurring interval of time; more generally, an interval of time specified or left indefinite; a certain series of years, months, days, or the like; a time; a cycle; an age; an epoch; as, the period of the Roman republic..

Period :: Period (n.) One of the great divisions of geological time; as, the Tertiary period; the Glacial period. See the Chart of Geology..

Period :: Period (n.) The termination or completion of a revolution, cycle, series of events, single event, or act; hence, a limit; a bound; an end; a conclusion..

Period :: Period (n.) A complete sentence, from one full stop to another; esp., a well-proportioned, harmonious sentence..

Period :: Period (n.) The punctuation point [.] that marks the end of a complete sentence, or of an abbreviated word..

Period :: Period (n.) One of several similar sets of figures or terms usually marked by points or commas placed at regular intervals, as in numeration, in the extraction of roots, and in circulating decimals..

Period :: Period (n.) The time of the exacerbation and remission of a disease, or of the paroxysm and intermission..

Period :: Period (n.) A complete musical sentence.

Period :: Period (v. t.) To put an end to.

Period :: Period (v. i.) To come to a period; to conclude. [Obs.] You may period upon this, that, etc..

Periodate :: Periodate (n.) A salt of periodic acid.

Periodic :: Periodic (a.) Pertaining to, derived from, or designating, the highest oxygen acid (HIO/) of iodine..

Periodic :: Periodic (a.) Alt. of Periodica.

Periodical :: Periodical (a.) Of or pertaining to a period or periods, or to division by periods..

Periodical :: Periodical (a.) Performed in a period, or regular revolution; proceeding in a series of successive circuits; as, the periodical motion of the planets round the sun..

Periodical :: Periodical (a.) Happening, by revolution, at a stated time; returning regularly, after a certain period of time; acting, happening, or appearing, at fixed intervals; recurring; as, periodical epidemics..

Periodical :: Periodical (a.) Of or pertaining to a period; constituting a complete sentence.

Periodical :: Periodical (n.) A magazine or other publication which appears at stated or regular intervals.

Periodicalist :: Periodicalist (n.) One who publishes, or writes for, a periodical..

Periodically :: Periodically (adv.) In a periodical manner.

Periodicalness :: Periodicalness (n.) Periodicity.

Periodicities :: Periodicities (pl. ) of Periodicit.

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