Columbia Encyclopedia

Search results

339 results found

IJsselmeer

(Encyclopedia)IJsselmeer īˈsəlmārˌ [key], shallow freshwater lake, NW Netherlands, bordering on the provinces of North Holland, Flevoland, and Friesland. It was formed from the old Zuider Zee by the constructi...

hairdressing

(Encyclopedia)hairdressing, arranging of the hair for decorative, ceremonial, or symbolic reasons. Primitive men plastered their hair with clay and tied trophies and badges into it to represent their feats and qual...

gynecology

(Encyclopedia)gynecology gīnˌəkŏlˈəjē [key], branch of medicine specializing in the disorders of the female reproductive system. Modern gynecology deals with menstrual disorders, menopause, infectious diseas...

geodesy

(Encyclopedia)geodesy jēŏdˈĭsē [key] or geodetic surveying, theory and practice of determining the position of points on the earth's surface and the dimensions of areas so large that the curvature of the earth...

gamma radiation

(Encyclopedia)gamma radiation, high-energy photons emitted as one of the three types of radiation resulting from natural radioactivity. It is the most energetic form of electromagnetic radiation, with a very short ...

joint, in anatomy

(Encyclopedia)joint, in anatomy, juncture between two bones. Some joints are immovable, e.g., those that connect the bones of the skull, which are separated merely by short, tough fibers of cartilage. Movable joint...

Musk, Elon

(Encyclopedia)Musk, Elon ēˈlŏn [key], 1971–, American business executive and entrepreneur, b. Pretoria...

Mayne, Thom

(Encyclopedia)Mayne, Thom, 1944–, American architect, b. Waterbury, Conn., grad. Univ. of Southern California (B.A., 1968), Harvard (M.A., 1978). In 1972 Mayne cofounded the firm Morphosis in Santa Monica, Calif....

Roche limit

(Encyclopedia)Roche limit, the closest distance that a celestial body held together only by its own gravity can come to a planet without being pulled apart by the planet's tidal (gravitational) force. This distance...

biology

(Encyclopedia)biology, the science that deals with living things. It is broadly divided into zoology, the study of animal life, and botany, the study of plant life. Subdivisions of each of these sciences include cy...