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competition, in biology

(Encyclopedia) competition, in biology, relationship between members of the same or different species in which individuals are adversely affected by those having the same living requirements, such as…

intestine

(Encyclopedia) intestine, muscular hoselike portion of the gastrointestinal tract extending from the lower end of the stomach (pylorus) to the anal opening. In humans this fairly narrow (about 1 in./…

Harpy, in Greek mythology

(Encyclopedia) Harpy, in Greek mythology, winged women with sharp claws who snatched food, objects, or people.

Good Agricultural Practices

(Encyclopedia) Good Agricultural Practices (GAP), economically, socially, and environmentally responsible methods and technologies for the raising and marketing of agricultural and horticultural…

breadroot

(Encyclopedia) breadroot or Indian breadroot, perennial plant (Psoralea esculenta) of the family Leguminosae (pulse family), indigenous to the American prairies and valued by Native Americans for the…

pine nut

(Encyclopedia) pine nut or piñonpiñonpĭnˈyən, pēˈnyōn [key], edible seed of various species of pine trees. Among the North American species that bear such edible seeds are the nut pines or piñons,…

Biosphere 2

(Encyclopedia) Biosphere 2, privately funded ecological research project in which eight people lived sealed in a 3.15-acre (1.28-hectare) structure for two years (Sept. 26, 1991–Sept. 26, 1993).…

public health

(Encyclopedia) public health, field of medicine and hygiene dealing with the prevention of disease and the promotion of health by government agencies. In the United States, public health authorities…

hibernation

(Encyclopedia) hibernationhibernationhīˌbərnāˈshən [key] [Lat.,= wintering], practice, among certain animals, of spending part of the cold season in a more or less dormant state, apparently as…

safety movement

(Encyclopedia) safety movement, widespread effort to prevent accidents that followed the increasing number of casualties in industry, traffic and transportation, and homes arising out of the…