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rust, in botany

(Encyclopedia) rust, in botany, name for various parasitic fungi of the order Uredinales and for the diseases of plants that they cause. Rusts form reddish patches of spores on the host plant. About…

nail, in anatomy

(Encyclopedia) nail, in anatomy, the horny outgrowth shielding the tip of the finger and the toe in humans and most other primates. The nail consists of dead cells pushed outward by dividing cells in…

scarab beetle

(Encyclopedia) scarab beetle or scarab, name for members of a large family of heavy-bodied, oval beetles (the Scarabaeidae), with about 30,000 species distributed throughout most of the world and…

conglomerate, in business

(Encyclopedia) conglomerate, corporation whose asset growth, often very rapid, comes largely through the acquisition of, or merger with, other firms whose products are largely unrelated to each other…

crayfish

(Encyclopedia) crayfish or crawfish, freshwater crustacean smaller than but structurally very similar to its marine relative the lobster, and found in ponds and streams in most parts of the world…

Dust Bowl

(Encyclopedia) Dust Bowl, the name given to areas of the U.S. prairie states that suffered ecological devastation in the 1930s and then to a lesser extent in the mid-1950s. The problem began during…

Newport News

(Encyclopedia) Newport News, independent city (1990 pop. 170,045), SE Va., on the Virginia peninsula, at the mouth of the James River, off Hampton Roads, near Norfolk; inc. 1896. It is a port for…

toothfish

(Encyclopedia) toothfish, common name for a genus (Dissostichus) of deep-water marine ray-finned fishes found in waters off S South America to Antarctica. The Patagonian toothfish, D. eleginoides, is…

shipworm

(Encyclopedia) shipworm or teredoshipwormtĕrēˈdō [key], marine bivalve mollusk of the family Teredinidae, specialized for boring in wood. A shipworm is not a worm, but a greatly elongated clam. Its…

oxalis

(Encyclopedia) oxalisoxalisŏkˈsəlĭs [key] or wood sorrel, any species of the plant genus Oxalis. Most of the cultivated kinds are tropical herbs used as window plants. The leaves are usually…