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water bug

(Encyclopedia)water bug, name for a large number of water-living bugs, comprising several families of the order Hemiptera (true bugs). All have jointed, sharp, sucking beaks, breathe air, and undergo gradual metamo...

sodium

(Encyclopedia)sodium, a metallic chemical element; symbol Na [Lat. natrium]; at. no. 11; at. wt. 22.98977; m.p. 97.81℃; b.p. 892.9℃; sp. gr. 0.971 at 20℃; valence +1. Sodium is a soft, silver-white metal. Ext...

boat

(Encyclopedia)boat, small, open nautical vessel propelled by sail, oar, pole, paddle, or motor. The use of the term boat for larger vessels, although common, is somewhat improper, but the line between boats and shi...

seal, in zoology

(Encyclopedia)seal, carnivorous aquatic mammal with front and hind feet modified as flippers, or fin-feet. The name seal is sometimes applied broadly to any of the fin-footed mammals, or pinnipeds, including the wa...

salmon, in zoology

(Encyclopedia)salmon sămˈən [key], member of the Salmonidae, a family of marine fish that spawn in freshwater, including the salmons, the trouts, and the chars (subfamily Salmoninae), the whitefish and the cisco...

Ctenophora

(Encyclopedia)CE5 Pleurobrachia, representative of the phylum Ctenophora Ctenophora tĭnŏfˈərə [key], a small phylum of exclusively marine, invertebrate animals, commonly known as comb jellies. Because they...

Galápagos Islands

(Encyclopedia)Galápagos Islands gəlăpˈəgōs [key] [Span.,=tortoises], archipelago and province, 3,029 sq mi ...

aquaculture

(Encyclopedia)aquaculture, the raising and harvesting of fresh- and saltwater plants and animals. The most economically important form of aquaculture is fish farming, an industry that accounts for an ever increasin...

Milwaukee

(Encyclopedia)Milwaukee mĭlwŏkˈē [key], city (1990 pop. 628,088), seat of Milwaukee co., SE Wis., at the point where the Milwaukee, Menominee, and Kinnickinnic rivers enter Lake Michigan; inc. 1846. The largest...

olive

(Encyclopedia)olive, common name for the Oleaceae, a family of trees and shrubs (including climbing forms) of warm temperate climates and of the Old World tropics, especially Asia and the East Indies. Many are popu...