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gametophyte

(Encyclopedia)gametophyte gəmēˈtəfītˌ [key], phase of plant life cycles in which the gametes, i.e., egg and sperm, are produced. The gametophyte is haploid, that is, each cell contains a single complete set o...

Sammartini, Giovanni Battista

(Encyclopedia)Sammartini, Giovanni Battista jōvänˈnē bät-tēsˈtä säm-märtēˈnē [key], c.1701–75, Italian composer. Sammartini lived most of his life in Milan. He was influential in the development of t...

Kakutani, Shizuo

(Encyclopedia)Kakutani, Shizuo, 1911–2004, Japanese mathematician, b. Osaka, Japan, grad. Tohoko Univ, Ph.D. Princeton, 1941. Kakutani repatriated to Japan during World War II, but returned to Princeton in 1948 a...

Egyptian language

(Encyclopedia)Egyptian language, extinct language of ancient Egypt, a member of the Afroasiatic family of languages (see Afroasiatic languages). The development of ancient Egyptian is usually divided into four peri...

Alabama, river, United States

(Encyclopedia)Alabama, river, 315 mi (507 km) long, formed in central Ala. by the confluence of the Coosa and Tallapoosa rivers N of Montgomery, Ala., and flowing SW to Mobile, Ala., where it joins the Tombigbee to...

rift valley

(Encyclopedia)rift valley, elongated depression, trough, or graben in the earth's crust, bounded on both sides by normal faults and occurring on the continents or under the oceans. The central flat block forming th...

American Association for the Advancement of Science

(Encyclopedia)American Association for the Advancement of Science (AAAS), private organization devoted to furthering the work of scientists and improving the effectiveness of science in the promotion of human welfa...

Ferdinand I, king of the Two Sicilies

(Encyclopedia)Ferdinand I, 1751–1825, king of the Two Sicilies (1816–25). He had previously been king of Naples (1759–99, 1799–1805, 1815–16) as Ferdinand IV and king of Sicily (1759–1816) as Ferdinand ...

Ferdinand II, king of the Two Sicilies

(Encyclopedia)Ferdinand II, 1810–59, king of the Two Sicilies (1830–59), son and successor of Francis I. Although initially he sought to improve the wretched conditions of his kingdom, he soon relapsed into the...

Francis I, king of the Two Sicilies

(Encyclopedia)Francis I, 1777–1830, king of the Two Sicilies (1825–30), son and successor of Ferdinand I. He continued the ruthless and reactionary policy of his father, and his court was notorious for waste an...