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porpoise

(Encyclopedia) porpoise, small whale of the family Phocaenidae, allied to the dolphin. Porpoises, like other whales, are mammals; they are warm-blooded, breathe air, and give birth to live young,…

pomegranate

(Encyclopedia) pomegranatepomegranatepŏmˈgrănĭt, pŏmˈə– [key], handsome deciduous and somewhat thorny large shrub or small tree (Punica granatum) belonging to the family Punicaceae, native to…

bark, in botany

(Encyclopedia) bark, outer covering of the stem of woody plants, composed of waterproof cork cells protecting a layer of food-conducting tissue—the phloem or inner bark (also called bast). As the…

sea spider

(Encyclopedia) sea spider, common name for members of the class Pycnogonida, long-legged, rather spiderlike organisms of the subphylum Chelicerata, widely distributed in marine waters. Most are tiny…

pronghorn

(Encyclopedia) pronghorn or prongbuck, hoofed herbivorous mammal, Antilocapra americana, of the W United States and N Mexico. Although it is often called the American, or prong-horned, antelope, the…

parrotfish

(Encyclopedia) parrotfish, common name for a member of a large group of colorful reef fishes of warm seas, resembling the wrasses but of a larger size. Long considered a separate family, Scaridae,…

Liepaja

(Encyclopedia) Liepaja or LiepayaLiepayaboth: lēĕˈpäyä [key], Ger. Libau, city (2011 provisional pop. 76,570), W Latvia. An ice-free port on the Baltic Sea, it is located at the end of an isthmus…

eutrophication

(Encyclopedia) eutrophicationeutrophicationy&oomacr;trōˌfĭkāˈshən [key], aging of a lake by biological enrichment of its water. In a young lake the water is cold and clear, supporting little life…

Hyades, in astronomy

(Encyclopedia) HyadesHyadeshīˈədēz [key], in astronomy, open star cluster in the constellation Taurus, located immediately to the right of the bright star Aldebaran. The cluster is about 130 light-…

horsetail

(Encyclopedia) horsetail, any plant of the genus Equisetum [Lat.,=horse bristle], the single surviving genus of a large group (Equisetophyta) of primitive vascular plants. Like the ferns and club…