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color

(Encyclopedia)color, effect produced on the eye and its associated nerves by light waves of different wavelength or frequency. Light transmitted from an object to the eye stimulates the different color cones of the...

color blindness

(Encyclopedia)color blindness, visual defect resulting in the inability to distinguish colors. About 8% of men and 0.5% of women experience some difficulty in color perception. Color blindness is usually an inherit...

spleen

(Encyclopedia)spleen, soft, purplish-red organ that lies under the diaphragm on the left side of the abdominal cavity. The spleen acts as a filter against foreign organisms that infect the bloodstream, and also fil...

Riel, Louis

(Encyclopedia)Riel, Louis lwē rēĕlˈ [key], 1844–85, Canadian insurgent, leader of two rebellions, b. Manitoba, of French and Métis parentage. In 1869–70 he led the rebels of the Red River settlements, main...

Devon cattle

(Encyclopedia)Devon cattle dĕvˈən [key], breed of cattle originated in England and brought to America by colonists as early as 1623. They range in color from deep red to pale chestnut, the most popular being “...

juniper

(Encyclopedia)juniper, any tree or shrub of the genus Juniperus, aromatic evergreens of the family Cupressaceae (cypress family), widely distributed over the north temperate zone. Many are valuable as a source of l...

Winnipeg, city, Canada

(Encyclopedia)Winnipeg wĭnˈĭpĕg [key], city (1991 pop. 616,790), provincial capital, SE Man., Canada, at the confluence of the Red and Assiniboine rivers. It is the province's largest city and one of the world'...

Atget, Eugène

(Encyclopedia)Atget, Eugène özhĕnˈ ätzhĕˈ [key], 1857–1927, French photographer. After working as a sailor and then as an actor for many years, Atget became a photographer at the age of 42. He began at onc...

Ascension, island

(Encyclopedia)Ascension əsĕnˈchən [key], island, 34 sq mi (88 sq km), in the S Atlantic, NW of Saint Helena and belonging to the British St. Helena overseas territory. Georgetown i...

Angus cattle

(Encyclopedia)Angus cattle ăngˈgəs [key], breed of black polled (hornless) beef cattle, originated in Scotland and introduced in 1873 to the United States, where they have become well established. Often called B...