General science

General science

A variety of science subjects concerning the fundamental knowledge about different aspects of our world and their underlying principles.

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General science

Marmot

Science; General science

A member of the genus Marmota in the squirrel family Sciuridae. Fourteen species occur mainly in mountainous areas in the northern hemisphere (see table ).

Parabola

Science; General science

A member of the class of curves that are intersections of a plane with a cone of revolution. It is obtained (see illustration ) when the cutting plane is parallel to an element of the cone.

A member of the pine family, Sequoia sempervirens , is the tallest tree in the Americas, attaining a height of 350 ft (107 m) and a diameter of 27 ft (8.2 m). Its range is limited to a strip along ...

Peroxisome proliferator-activated receptor

Science; General science

A member of the nuclear hormone receptor superfamily of transcription factors, similar in both structure and function to the steroid, thyroid, and retinoid receptors. Peroxisome proliferator-activated ...

Parainfluenza virus

Science; General science

A member of the genus Paramyxovirus of the family Paramyxoviridae which is associated with a variety of respiratory illnesses. The virus particles range in size from 90 to 200 nanometers, ...

Bytownite

Science; General science

A member of the plagioclase feldspar solid-solution series with a composition ranging from Ab 30 An 70 to Ab 10 An 90 (Ab = NaAlSi 3 O 8 and An = CaAl 2 Si 2 O 8 ) (see illus. ). In the ...

Yak

Science; General science

A member of the mammalian cattle family Bovidae in the order Artiodactyla. It is the least-known species of wild cattle alive today. Yaks ( Bos grunniens ) have been domesticated for at least several ...