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woodchuck

(Encyclopedia)woodchuck or groundhog, common name of a North American species of marmot, Marmota monax. This large rodent is found in open woods and ravines throughout most of Canada and the NE United States. Its h...

bighorn, in zoology

(Encyclopedia)bighorn or Rocky Mountain sheep, wild sheep, Ovis canadensis, of W North America, formerly plentiful in mountains from SW Canada to N Mexico. Indiscriminate hunting, disease, and scarcity of food enor...

trunkfish

(Encyclopedia)trunkfish, any member of a family of fishes, Ostraciidae, also called boxfishes, that have short triangular bodies covered by firmly united hexagonal bony plates. Only the jaw, the bases of the fins, ...

Tobias, Philip Valentine

(Encyclopedia)Tobias, Philip Valentine, 1925–2012, South African paleoanthropologist, b. Durban. He graduated from the Univ. of Witwatersrand (Ph.D., 1953) and taught there for five decades. Tobias entered paleoa...

Theodora

(Encyclopedia)Theodora thēədôrˈə [key], d. 548, Byzantine empress. Information about her early career comes from the often-questionable source, the Secret History of Procopius. It appears that she was the daug...

species

(Encyclopedia)species, in biology, a category of classification, the original and still the basic unit in the demarcation of plant and animal types. The species marks the boundary between populations of organisms r...

shell

(Encyclopedia)shell, in zoology, hard outer covering secreted by an animal for protection. It is also called the test, crust, or carapace. The term usually refers to the calcareous shells of the many species of mol...

pharmacology

(Encyclopedia)pharmacology, study of the changes produced in living animals by chemical substances, especially the actions of drugs, substances used to treat disease. Systematic investigation of the effects of drug...

cape buffalo

(Encyclopedia)cape buffalo, species of short-haired African ungulate, or hoofed mammal, Syncerus caffer. The cape, or African, buffalo may reach 7 ft (2.1 m) in length, weigh more than 1,500 lb (670 kg), and reach ...

Çatalhöyük

(Encyclopedia)Çatalhöyük –hü– [key], Neolithic settlement on the Konya Plain in S Turkey that flourished c.6500–c.5800 b.c. The site, first excavated (1961–65) by British archaeologist James Mellaart, o...