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snorkel

(Encyclopedia)snorkel, tube through which a submarine or diver can draw air while underwater. When in use, the top of the snorkel tube extends above the water surface into the air. The first snorkels were probably ...

Yazidi

(Encyclopedia)Yazidi or Yezidi Middle Eastern religious community whose beliefs incorporate elements of Zoroastrianism, Sufism, Christianity, Manichaeism, and Judaism. Its members, numbering between 200,000 and one...

Missouri, river, United States

(Encyclopedia)Missouri, river, c.2,565 mi (4,130 km) long (including its Jefferson-Beaverhead-Red Rock headstream), the longest river of the United States and the principal tributary of the Mississippi River. The l...

Skelligs

(Encyclopedia)Skelligs, rocky islands, off SW Republic of Ireland, in Co. Kerry, comprising Lemon Rock, Little Skellig, and Great Skellig. Climbing the rocks to the peaks of Great Skellig, also known as Skellig Mic...

Ivan VI

(Encyclopedia)Ivan VI, 1740–64, czar of Russia (1740–41), great-grandson of Ivan V. He was the son of Prince Anthony Ulric of Brunswick-Wolfenbüttel and of Anna Leopoldovna. An infant, he succeeded his great-a...

Mackenzie

(Encyclopedia)Mackenzie, river, c.1,120 mi (1,800 km) long, issuing from Great Slave Lake, Northwest Territories, Canada, and flowing generally NW to the Arctic Ocean through a great delta. Between Great Slave Lake...

Union, Act of

(Encyclopedia)Union, Act of. For the union of England and Scotland (1707), see Great Britain; for the union of Ireland (1800) with Great Britain, see Ireland. ...

Gelon

(Encyclopedia)Gelon jēˈlŏn [key], d. 478 b.c., Greek Sicilian ruler. As tyrant of Gela, his native city, he interfered in the struggle for power in Syracuse (485 b.c.) and made himself the leader of the popular ...

Shuvalov, Piotr Andreyevich, Count

(Encyclopedia)Shuvalov, Piotr Andreyevich, Count pyôˈtər əndrāˈəvĭch sho͞oväˈləf [key], 1827–89, Russian administrator and diplomat. An adviser to Czar Alexander II, he opposed the czar's reforms and ...

Brunel, Sir Marc Isambard

(Encyclopedia)Brunel, Sir Marc Isambard ĭzˈəmbärdˌ bro͞onĕlˈ [key], 1769–1849, British engineer and inventor. Born in France, he came to the United States in 1793 as a royalist refugee. He became chief en...