Columbia Encyclopedia

(Encyclopedia) Wagner, Honus hōˈnŭs wăgˈnər [key], 1874–1955, American baseball player, b. Mansfield (now Carnegie), Pa. His real name was John Peter Wagner. He played semiprofessional ball in Ohio and was g...

(Encyclopedia) Zumárraga, Juan de hwän dā tho͞omäˈrägä [key], 1468–1548, Spanish churchman, first bishop of Mexico, a Franciscan. Going to Mexico in 1528, he became prominent in governmental affairs and op...

(Encyclopedia) scallop or pecten, marine bivalve mollusk. Like its close relative the oyster, the scallop has no siphons, the mantle being completely open, but it differs from other mollusks in that both mantle edge...

(Encyclopedia) tarweed, any of several related resinous herbs (chiefly species of Hemizonia and Madia) of the family Asteraceae (aster family), having strongly scented and sticky herbage. Most North American species...

(Encyclopedia) reconnaissance satellite, artificial satellite launched by a country to provide intelligence information on the military activities of foreign countries. There are four major types. Early-warning sate...

(Encyclopedia) giardiasis jēärdīˈəsĭs, järdīˈəsĭs [key], infection of the small intestine by a protozoan, Giardia lamblia. Giardia, which was named after Alfred M. Giard, a French biologist, is spread via...

(Encyclopedia) Halley's comet or Comet Halley hălˈē, hāˈlē [key], periodic comet named for Edmond Halley, who observed it in 1682 and identified it as the one observed in 1531 and 1607. Halley did not live to ...

(Encyclopedia) Cretaceous period krĭtāˈshəs [key], third and last period of the Mesozoic era of geologic time (see Geologic Timescale, tablegeologic timescale, table), lasting from approximately 144 to 65 millio...

(Encyclopedia)  CE5 A. Ribbon worm, representative of the phylum Nemertinea B. Internal anatomy of a ribbon worm Nemertinea nĕmərtĭnˈēə [key], phylum of elongated, often flattened, marine Worms, sometimes c...

(Encyclopedia) Ordovician period ôrdəvĭshˈən [key] [from the Ordovices, ancient tribe of N Wales], second period of the Paleozoic era of geologic time (see Geologic Timescale, tablegeologic timescale, table) fr...