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Annapolis, river, Canada

(Encyclopedia)Annapolis, river, c.75 mi (120 km) long, rising in W Nova Scotia, Canada, and flowing SW past Annapolis Royal to Annapolis Basin, an arm of the Bay of Fundy. The entrance to the basin, bordered by cli...

Gironde, estuary, France

(Encyclopedia)Gironde, estuary, c.45 mi (70 km) long and from 2 to 7 mi (3.2–11.3 km) wide, formed by the Garonne and Dordogne rivers, which join c.14 mi (23 km) N of Bordeaux. Sand banks and a high tidal range h...

Spuyten Duyvil Creek

(Encyclopedia)Spuyten Duyvil Creek spīˈtən dīˈvəl [key], tidal channel, now a ship canal, c.1 mi (1.6 km) long, SE N.Y., in New York City. It separates the northern tip of Manhattan island from the mainland a...

Thames , river, United States

(Encyclopedia)Thames thāmz [key], river, c.15 mi (25 km) long, formed by the confluence of the Yantic and Shetucket rivers at Norwich, E Conn., and flowing south to Long Island Sound at New London. Primarily a tid...

Piscataqua

(Encyclopedia)Piscataqua pĭskătˈəkwə, –kwā [key], navigable river, 12 mi (19 km) long, formed by the junction of the Cocheco and the Salmon Falls rivers, SE N.H., and flowing SE to Portsmouth harbor, formin...

sideband

(Encyclopedia)sideband, any frequency component of a modulated carrier wave other than the frequency of the carrier wave itself, i.e., any frequency added to the carrier as a result of modulation; sidebands carry t...

Phaeophyta

(Encyclopedia)Phaeophyta fēŏfˈətə [key], phylum (division) of the kingdom Protista consisting of those organisms commonly called brown algae. Many of the world's familiar seaweeds are members of Phaeophyta. Th...

Huygens, Christiaan

(Encyclopedia)Huygens, Christiaan krĭsˈtyän hoiˈgəns [key], 1629–95, Dutch mathematician and physicist; son of Constantijn Huygens. He improved telescopic lenses and discovered (1655) a satellite of Saturn a...

breakwater

(Encyclopedia)breakwater, offshore structure to protect a harbor from wave energy or deflect currents. When it also serves as a pier, it is called a quay; when covered by a roadway it is called a mole. In the Unite...

Io, in astronomy

(Encyclopedia)Io īˈō [key], in astronomy, one of the 39 known moons, or natural satellites, of Jupiter. Io is subject to Jupiter's enormous tidal forces and is, as a result, the most volcanically active body in ...