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Weismann, August

(Encyclopedia)Weismann, August ouˈgo͝ost vīsˈmän [key], 1834–1914, German biologist. He taught zoology at the Univ. of Freiburg from 1866 to 1912. He is known as the originator of the germ-plasm theory of he...

Sète

(Encyclopedia)Sète, formerly Cette both: sĕt [key], town (1990 pop. 41,916), Hérault dept., S France, in Languedoc, on the Mediterranean. It is one of the most important commercial and fishing ports of S France,...

fluke

(Encyclopedia)fluke, parasitic flatworm of the trematoda class, related to the tapeworm. Instead of the cilia, external sense organs, and epidermis of the free-living flatworms, adult flukes have sucking disks with...

citronella

(Encyclopedia)citronella, common name for a grass, Cymbopogon nardus, the source of oil of citronella, used in perfumes and soaps and as an insect repellent. The plant, with bluish green, lemon-scented leaves, is c...

gnat

(Encyclopedia)gnat, common name for any one of a number of small, fragile-looking two-winged flies of the suborder Nematocera, order Diptera, which includes the families Tipulidae (crane flies), Bibionidae (hairfli...

schistosomiasis

(Encyclopedia)schistosomiasis bĭlˌhärzīˈəsĭs [key], or snail fever, parasitic disease caused by blood flukes, trematode worms of the genus Schistosoma. Three species are human parasites: S. mansoni, S. japon...

clam

(Encyclopedia)clam, common name for certain bivalve mollusks, especially for marine species that live buried in mud or sand and have valves (the two pieces of the shell) of equal size. The oval valves, which cover ...

Goldschmidt, Richard Benedikt

(Encyclopedia)Goldschmidt, Richard Benedikt, 1878–1958, American zoologist and geneticist, b. Germany, Ph.D. Univ. of Heidelberg, 1902. Goldschmidt taught at the Univ. of Munich (1903–14) and was at the Kaiser ...

barnacle

(Encyclopedia)barnacle, common name of the sedentary crustacean animals constituting the infraclass Cirripedia. Barnacles are exclusively marine and are quite unlike any other crustacean because of the permanently ...

Kellogg, Vernon Lyman

(Encyclopedia)Kellogg, Vernon Lyman, 1867–1937, American zoologist, b. Emporia, Kans., B.A. Univ. of Kansas, 1889. He was professor (1894–1920) of entomology at Stanford Univ. He served (1915–16) as director ...