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Spanish moss

(Encyclopedia) Spanish moss, fibrous grayish-green epiphyte (Tillandsia usneoides) that hangs on trees of tropical America and the Southern states, also called Florida, southern, or long moss. It is…

splint

(Encyclopedia) splint, rigid or semiflexible device for the immobilization of displaced or fractured parts of the body. Most commonly employed for fractures of bones, a splint may be a first-aid…

Americana

(Encyclopedia) Americana, term used to describe material printed in or about the Americas, or written by Americans; usually restricted to the formative period in the history of the two continents.…

Coffin, Charles Carleton

(Encyclopedia) Coffin, Charles Carleton, 1823–96, American journalist, b. Boscawen, N.H. During the Civil War, he was a correspondent in the field for the Boston Journal, and he served in the same…

Gilbert, Walter

(Encyclopedia) Gilbert, Walter, 1932–, American molecular biologist, b. Boston, Ph.D. Cambridge, 1957. In 1968 he became a professor of biophysics at Harvard, where he had taught since 1959. He…

travertine

(Encyclopedia) travertinetravertinetrăvˈərtĭn, –tēn [key], form of massive calcium carbonate, CaCO3, resulting from deposition by springs or rivers. It is often beautifully colored and banded as a…

Wright, Russel

(Encyclopedia) Wright, Russel, 1905–76, American industrial designer, b. Lebanon, Ohio. Wright was notable for introducing modern functional forms, simplified shapes, and cheerful colors in furniture…

Roche limit

(Encyclopedia) Roche limit, the closest distance that a celestial body held together only by its own gravity can come to a planet without being pulled apart by the planet's tidal (gravitational)…

sea urchin

(Encyclopedia) sea urchin, spherical-shaped echinoderm with movable spines covering the body. The body wall is a firm, globose shell, or test, made of fused skeletal plates and marked by regularly…

programmed instruction

(Encyclopedia) programmed instruction, method of presenting new subject matter to students in a graded sequence of controlled steps. Students work through the programmed material by themselves at…