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Tertiary :: Tertiary (n.) The Tertiary era, period, or formation..

Taxeopoda :: Taxeopoda (n. pl.) An order of extinct Mammalia found in the Tertiary formations.

Tertiary :: Tertiary (n.) One of the quill feathers which are borne upon the basal joint of the wing of a bird. See Illust. of Bird.

Cenozoic :: Cenozoic (a.) Belonging to the most recent division of geological time, including the tertiary, or Age of mammals, and the Quaternary, or Age of man. [Written also caenozoic, cainozoic, kainozoic.] See Geology..

Oreodon :: Oreodon (n.) A genus of extinct herbivorous mammals, abundant in the Tertiary formation of the Rocky Mountains. It is more or less related to the camel, hog, and deer..

Pliocene :: Pliocene (a.) Of, pertaining to, or characterizing, the most recent division of the Tertiary age..

Laramie Group :: Laramie group () An extensive series of strata, principally developed in the Rocky Mountain region, as in the Laramie Mountains, and formerly supposed to be of the Tertiary age, but now generally regarded as Cretaceous, or of intermediate and transitional character. It contains beds of lignite, often valuable for coal, and is hence also called the lignitic group. See Chart of Geology..

Crag :: Crag (n.) A partially compacted bed of gravel mixed with shells, of the Tertiary age..

Toxodonta :: Toxodonta (n.pl.) An extinct order of Mammalia found in the South American Tertiary formation. The incisor teeth were long and curved and provided with a persistent pulp. They are supposed to be related both to the rodents and ungulates. Called also Toxodontia.

Triethylamine :: Triethylamine (n.) A tertiary amine analogous to trimethylamine.

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

Diabase :: Diabase (n.) A basic, dark-colored, holocrystalline, igneous rock, consisting essentially of a triclinic feldspar and pyroxene with magnetic iron; -- often limited to rocks pretertiary in age. It includes part of what was early called greenstone..

Posttertiary :: Posttertiary (a.) Following, or more recent than, the Tertiary; Quaternary..

Tertiary :: Tertiary (a.) Being of the third formation, order, or rank; third; as, a tertiary use of a word..

Molasse :: Molasse (n.) A soft Tertiary sandstone; -- applied to a rock occurring in Switzerland. See Chart of Geology.

Sivatherium :: Sivatherium (n.) A genus of very large extinct ruminants found in the Tertiary formation of India. The snout was prolonged in the form of a proboscis. The male had four horns, the posterior pair being large and branched. It was allied to the antelopes, but very much larger than any exsisting species..

Tertial :: Tertial (a. & n.) Same as Tertiary.

Bad Lands :: Bad lands () Barren regions, especially in the western United States, where horizontal strata (Tertiary deposits) have been often eroded into fantastic forms, and much intersected by ca–ons, and where lack of wood, water, and forage increases the difficulty of traversing the country, whence the name, first given by the Canadian French, Mauvaises Terres (bad lands)..

Syphilitic :: Syphilis (n.) The pox, or venereal disease; a chronic, specific, infectious disease, usually communicated by sexual intercourse or by hereditary transmission, and occurring in three stages known as primary, secondary, and tertiary syphilis. See under Primary, Secondary, and Tertiary..

Amblypoda :: Amblypoda (n. pl.) A group of large, extinct, herbivorous mammals, common in the Tertiary formation of the United States..

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