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methionine

(Encyclopedia)CE5 methionine mĕthīˈənēn [key], organic compound, one of the 20 amino acids commonly found in animal proteins. Only the L-stereoisomer appears in mammalian protein. It is one of the several e...

Moran, Edward

(Encyclopedia)Moran, Edward mərănˈ [key], 1829–1901, American painter of marine and historical subjects, b. England. He came to the United States with his family in 1844. In 1899 he completed a series of 13 pa...

Nazca

(Encyclopedia)Nazca or Nasca both: näsˈkä [key], ancient culture of the Nazca, Pisco, and Ica river valleys on the desert coast of S Peru. Flourishing during the first millennium a.d., the Nazca culture seems to...

leucine

(Encyclopedia)CE5 leucine lo͞oˈsēn [key], organic compund, one of the 20 amino acids commonly found in animal proteins. Only the l-stereooisomer appears in mammalian protein. It is one of several essential am...

Assyrian art

(Encyclopedia)Assyrian art. An Assyrian artistic style distinct from that of Babylonian art (see Sumerian and Babylonian art), which was the dominant contemporary art in Mesopotamia, began to emerge c.1500 b.c. and...

asthma

(Encyclopedia)asthma ăzˈmə, ăsˈ– [key], chronic inflammatory respiratory disease characterized by periodic attacks of wheezing, shortness of breath, and a tight feeling in the chest. A cough producing sticky...

pangolin

(Encyclopedia)pangolin păng-gōˈlĭn [key], armored, toothless mammal of tropical Asia and Africa. Pangolins range in length from 3 to 6 ft (90–180 cm) including the long, broad tail. Their snouts are narrow an...

parrotfish

(Encyclopedia)parrotfish, common name for a member of a large group of colorful reef fishes of warm seas, resembling the wrasses but of a larger size. Long considered a separate family, Scaridae, they are now group...

tundra

(Encyclopedia)tundra tŭnˈdrə [key], treeless plains of N North America and N Eurasia, lying principally along the Arctic Circle, on the coasts and islands of the Arctic Ocean, and to the north of the coniferous ...

wax

(Encyclopedia)wax, substance secreted by glands on the abdomen of the bee and known commonly as beeswax; also various substances resembling beeswax. Waxes are mixtures comprising chiefly esters of monohydroxy alcoh...