Columbia Encyclopedia

(Encyclopedia)  CE5 Bluet, Houstonia caerulea, a member of the madder family madder, common name for the Rubiaceae, a family of chiefly tropical and subtropical trees, shrubs, and herbs, especially abundant in N ...

(Encyclopedia) diode dīˈōd [key], two-terminal electronic device that permits current flow predominantly in only one direction. Most diodes are semiconductor devices; diode electron tubes are now used only for a ...

(Encyclopedia) jellyfish, common name for the free-swimming stage (see polyp and medusa), of certain invertebrate animals of the phylum Cnidaria (the coelenterates). The body of a jellyfish is shaped like a bell or ...

(Encyclopedia) kangaroo, name for a variety of hopping marsupials, or pouched mammals, of the family Macropodidae, found in Australia, Tasmania, and New Guinea. The term is applied especially to the large kangaroos ...

(Encyclopedia) Neanderthal man –tôlˌ [key], a species of Homo, the genus to which contemporary humans belong, known as H. neandertalensis after Neanderthal (now Neandertal), Germany, the valley where the first s...

(Encyclopedia) artificial intelligence (AI), the use of computers to model the behavioral aspects of human reasoning and learning. Research in AI is concentrated in some half-dozen areas. In problem solving, one mus...

(Encyclopedia) Maeterlinck, Maurice môrēsˈ mätĕrlăNkˈ [key], 1862–1949, Belgian author who wrote in French. After practicing law unsuccessfully for several years, he went to Paris in 1897. He had already be...

(Encyclopedia) aconite ăkˈənīt [key], monkshood, or wolfsbane, any of several species of the genus Aconitum of the family Ranunculaceae (buttercup family), hardy perennial plants of the north temperate zone, gro...

(Encyclopedia) Attenborough, Sir David Frederick, 1926–, British naturalist and television personality. After serving in the Royal Navy (1947–49), he worked as an editor, then joined the BBC (1952) as a producer...

(Encyclopedia) collie, breed of large, agile working dog developed in Scotland during the 17th and 18th cent. It stands from 22 to 26 in. (55.9–66 cm) high at the shoulder and weighs from 50 to 75 lb (22.7–34 kg...