·- 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.
·vt To put an end to. II. Period ·noun A complete musical sentence. III. Period ·vi To come to a p...
Webster's Dictionary of the English Language
·- A period in the American eocene, the lowest in the tertiary age except the lignitic. ...
·- The closing subdivision of the Devonian age in America. The rocks of this period are well develop...
·- A subdivision of the Quaternary age immediately following the Glacial period; — so named from be...
·- A subdivision of the Devonian system of America; — so named from Hamilton, Madison Co., New York...
·- A subdivision or the American Upper Silurian system, embracing the Medina, Clinton, and Niagara e...
·- The period in which the American Upper Silurian system, containing the brine-producing rocks of c...
·- A subdivision in the lower Silurian system of America; — so named from Trenton Falls, in New Yor...
The time of revolution of a primary or secondary planet in reference to its line of apsides; that is...
The Sailor's Word-Book
A period of 7980 years, dating from B.C. 4713; being the product of the numbers 15, 19, and 28 multi...
See revolution, time of. ...
If the interval of periodic time of a planet, or comet, be taken in reference to its passages throug...