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Murray, river, Australia

(Encyclopedia)Murray, principal and second-longest river of Australia, 1,609 mi (2,589 km) long, rising in the Australian Alps, SE New South Wales, and flowing westward to form the New South Wales–Victoria bounda...

Nafud

(Encyclopedia)Nafud nĕfo͞odˈ [key], desert area in the northern part of the Arabian peninsula, occupying a great oval depression; 180 mi (290 km) long and 140 mi (225 km) wide. This area of red sand is surrounde...

arm

(Encyclopedia)arm, upper limb in humans. Three long bones form the framework of the arm: the humerus of the upper arm, and the radius (outer bone) and ulna (inner bone) of the forearm. The radius and ulna run paral...

Sadi

(Encyclopedia)Sadi or Saadi both: säˈdē [key], Persian poet, 1184–1291. b. Shiraz. Orphaned at an early age, Sadi studied in Baghdad, where he met Suhrawardi, a major Sufi figure. Having to flee Baghdad becaus...

Red River, river, China and Vietnam

(Encyclopedia)Red River, Chinese Yuan Chiang, Vietnamese Song Hong, chief river of N Vietnam, 730 mi (1,175 km) long, rising in Yunnan prov., S China, and flowing southeast, in deep, narrow gorges, through N Vietna...

markhor

(Encyclopedia)markhor märˈkôr [key], wild goat, Capra falconeri, found in the rugged mountains of central Asia, from S Russia to the W Himalayas. Largest of the goats, the male may stand over 40 in. (100 cm) at ...

rinderpest

(Encyclopedia)rinderpest or cattle plague, an acute and highly infectious viral disease of cattle. It less frequently affects other ruminants, such as sheep, goats, and wild game. After an incubation period of thre...

amenorrhea

(Encyclopedia)amenorrhea āmĕnˌərēˈa, əmĕnˌ– [key], cessation of menstruation. Primary amenorrhea is a delay in or a failure to start menstruation; secondary amenorrhea is an unexpected stop to the menstr...

Great Bear Lake

(Encyclopedia)Great Bear Lake, largest lake of Canada and fourth largest of North America, c.12,275 sq mi (31,800 sq km), c.190 mi (310 km) long and from 25 to 110 mi (40–177 km) wide, Northwest Territories, on t...

urethra

(Encyclopedia)urethra yo͝orēˈthrə [key], canal in most mammals that carries urine from the bladder to the outside of the body; in the male it also serves as a genital duct. The urethra is about 11⁄2 in. long ...