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Oka, river, Siberian Russia

(Encyclopedia)Oka, river, c.600 mi (970 km) long, rising in the Sayan Mts., Buryat Republic, S central Siberian Russia. It flows N through Irkutsk oblast to join the Angara River below Bratsk. The lower Oka valley ...

Caspian Sea

(Encyclopedia)Caspian Sea kăsˈpēən [key], Lat. Mare Caspium or Mare Hyrcanium, salt lake, c.144,000 sq mi (373,000 sq km), between Europe and Asia; the largest lake in the world. It is bordered on the northeast...

pond scum

(Encyclopedia)pond scum, accumulation of floating green algae on the surface of stagnant or slowly moving waters, such as ponds and reservoirs. One of the commonest forms is Spirogyra. ...

Redwood City

(Encyclopedia)Redwood City, city (1990 pop. 66,072), seat of San Mateo co., W Calif., on San Francisco Bay; inc. 1868. Manufactures include commmunications, electrical, electronic, and medical equipment. There is a...

Pará, river, Brazil

(Encyclopedia)Pará, river, c.200 mi (320 km) long, N Brazil. It is actually the southeastern arm or estuary of the Amazon, divided from the rest of the river by Marajó island. It receives the waters of the Tocant...

seas, freedom of the

(Encyclopedia)seas, freedom of the, in international law, the principle that outside its territorial waters (see waters, territorial) a state may not claim sovereignty over the seas, except with respect to its own ...

Pacific Remote Islands Marine National Monument

(Encyclopedia)Pacific Remote Islands Marine National Monument, c.490,000 sq mi (1,260,000 sq km), central Pacific Ocean; est. 2009. The monument comprises the waters and reefs surrounding seven islands and atolls, ...

cod

(Encyclopedia)cod, member of the large family Gadidae, comprising commercially important food fishes. The family, whose members are found in the N Atlantic and Pacific, includes the tomcods, the haddock, and the po...

Shinano

(Encyclopedia)Shinano shĭnäˈnō [key], river, longest of Honshu, Japan, c.230 mi (370 km) long. It rises in the mountains of central Honshu and flows generally NE to the Sea of Japan at Niigata. It waters the fe...

scallop

(Encyclopedia)scallop or pecten, marine bivalve mollusk. Like its close relative the oyster, the scallop has no siphons, the mantle being completely open, but it differs from other mollusks in that both mantle edge...