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‘Oumuamua

(Encyclopedia)‘Oumuamua ōmo͞oˈəmo͞oˈə [key], officially 1I/2017 U1 (‘Oumuamua), interstellar object, the first to be discovered in the solar system. Highly variable in brightness, it also is highly and u...

Verdun, battle of

(Encyclopedia)Verdun, battle of, the longest and one of the bloodiest engagements of World War I. Two million men were engaged. It began on Feb. 21, 1916, when the Germans, commanded by Crown Prince Frederick Willi...

Appalachian Trail

(Encyclopedia)Appalachian Trail, officially Appalachian National Scenic Trail, hiking path, 2,144 mi (3,450 km) long, passing through 14 states, E United States. Conceived in 1921 by Benton MacKaye, forester and re...

acetylcholine

(Encyclopedia)acetylcholine əsētˌəlkōˈlēn [key], a small organic molecule liberated at nerve endings as a neurotransmitter. It is particularly important in the stimulation of muscle tissue. The transmission ...

Nicol prism

(Encyclopedia)Nicol prism nĭkˈəl [key], optical device invented (1828) by William Nicol of Edinburgh. It consists essentially of a crystal of calcite, or Iceland spar, that is cut at an angle into two equal piec...

Ashley, William Henry

(Encyclopedia)Ashley, William Henry, c.1778–1838, American fur trader and politician, b. Virginia. In 1820 he was elected lieutenant governor of Missouri. He sent fur-trading expeditions up the Missouri River to ...

Brees, Drew

(Encyclopedia)Brees, Drew (Andrew Christopher Brees) brēz [key], 1979–, American football player, b. Austin, Tex. At Purdue in 2000 he quarterbacked the Boilermakers to the Big 10 championship (shared with Michi...

blue baby

(Encyclopedia)blue baby, infant born with a congenital heart defect that causes a bluish coloration of the skin as a result of cyanosis (deoxygenated blood). The color is most noticeable around the lips and at the ...

Sugihara, Chiune

(Encyclopedia)Sugihara, Chiune, 1900–1986, Japanese diplomat who saved several thousand European Jews during World War II. He served (1920–22) in the army, then joined the Japanese foreign ministry. In 1939 he ...

Sukhumi

(Encyclopedia)Sukhumi so͝okho͞oˈmē [key], Abkhaz Sukhum, city (2011 pop. 62,914), capital of Abkhazia, a region in W Georgia that has had de facto independence since the 1990. Located on the Black Sea, it is a ...