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embryo screening

(Encyclopedia)embryo screening, procedure (see genetic testing) in which a single cell is removed from an embryo two or three days after it has been conceived through in vitro fertilization and tested for genetic a...

spring, in geology

(Encyclopedia)spring, in geology, natural flow of water from the ground or from rocks, representing an outlet for the water that has accumulated in permeable rock strata underground. Some of the water that falls as...

greenhouse

(Encyclopedia)greenhouse, enclosed glass house used for growing plants in regulated temperatures, humidity, and ventilation. A greenhouse can range from a small room carrying a few plants over the winter, to an imm...

metaphysical poets

(Encyclopedia)metaphysical poets, name given to a group of English lyric poets of the 17th cent. The term was first used by Samuel Johnson (1744). The hallmark of their poetry is the metaphysical conceit (a figure ...

Ausonius

(Encyclopedia)Ausonius (Decimus Magnus Ausonius) ôsōˈnēəs [key], c.310–c.395, Latin poet and man of letters, b. Bordeaux. He tutored Gratian, who, when he ascended the throne, made Ausonius prefect of Gaul, ...

Marne, battle of the

(Encyclopedia)Marne, battle of the, two important battles of World War I that are named for the Marne River. In the first battle (Sept. 6–9, 1914) the German advance on Paris was halted at the Marne by the Allies...

Piranesi, Giovanni Battista

(Encyclopedia)Piranesi, Giovanni Battista jōvänˈnē bät-tēˈstä pēränāˈzē [key], 1720–78, Italian etcher and architect. The greater part of his life was spent in Rome, where he made etchings of the bui...

Timrod, Henry

(Encyclopedia)Timrod, Henry, 1828–67, American poet, b. Charleston, S.C., studied at the Univ. of Georgia. He was known as “the laureate of the Confederacy.” Timrod became editor of the Columbia South Carolin...

Betti, Ugo

(Encyclopedia)Betti, Ugo o͞oˈgō bətˈtē [key], 1892–1953, Italian dramatist and poet. He was a judge by profession. His earliest published works were two volumes of poetry (1922 and 1932), but he is remember...

Young, Edward

(Encyclopedia)Young, Edward, 1683–1765, English poet and dramatist. After a disappointing political life he took holy orders about 1724, serving for a time as the royal chaplain before becoming rector of Welwyn i...