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yaws

(Encyclopedia)yaws or frambesia, tropical infection of the skin caused by a spirochete (Treponema pertenue) closely related to that causing syphilis. Yaws, however, is not a sexually transmitted disease, i.e., it i...

sarin

(Encyclopedia)sarin zärēnˈ [key], volatile liquid used as a nerve gas. It boils at 147℃ but evaporates quickly at room temperature; its vapor is colorless and odorless. Chemically, sarin is fluoroisopropoxymet...

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...

Akeley, Carl Ethan

(Encyclopedia)Akeley, Carl Ethan ākˈlē [key], 1864–1926, American naturalist, animal sculptor, and author, b. Orleans co., N.Y. He served (1887–95) at the Museum of Milwaukee; from 1895 to 1909 he was at the...

chamois

(Encyclopedia)chamois shămˈē [key], hollow-horned, hoofed mammal, Rupicapra rupicapra, found in the mountains of Europe and the E Mediterranean. It is about the size of a large goat and is light brown with a bla...

hydrotherapy

(Encyclopedia)hydrotherapy, use of water in the treatment of illness or injury. Although the medicinal and hygienic value of water was recognized by the early Greeks, hydrotherapy attained its widest use in the 18t...

pacemaker, artificial

(Encyclopedia)pacemaker, artificial, device used to stimulate a rhythmic heartbeat by means of electrical impulses. Implanted in the body when the heart's own electrical conduction system (natural pacemaker) does n...

patent medicine

(Encyclopedia)patent medicine, packaged drugs that can be obtained without prescription; the term was formerly used to describe quack remedies sold by peddlers. Patent, or proprietary, medicines are advertised to t...

snowshoes

(Encyclopedia)snowshoes, footgear enabling the wearer to walk on soft snow without sinking. A snowshoe consists of a light frame of tough wood or aluminum, roughly the shape of a large tennis racket, which is strun...

tobogganing

(Encyclopedia)tobogganing, sport of coasting down snowy hillsides or chutes on a toboggan, a flat-bottomed vehicle made of hard wood. The toboggan, typically measuring 1.5 ft by 6–8 ft (.46 m by 1.8–2.4 m), is ...