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larva, in zoology

(Encyclopedia)larva, independent, immature animal that undergoes a profound change, or metamorphosis, to assume the typical adult form. Larvae occur in almost all of the animal phyla; because most are tiny or micro...

Slavic languages

(Encyclopedia)Slavic languages, also called Slavonic languages, a subfamily of the Indo-European family of languages. Because the Slavic group of languages seems to be closer to the Baltic group than to any other, ...

ion, in chemistry

(Encyclopedia)ion, atom or group of atoms having a net electric charge. Ionization has many applications. Vapor lamps and fluorescent lamps take advantage of the light given off when positive ions recombine with ...

Porifera

(Encyclopedia)CE5 A. Canal systems of the three morphological types of sponges B. Internal anatomy of an asconoid sponge, representative of the phylum Porifera Porifera pōrĭfˈərə [key] [Lat.,=pore bearer],...

school

(Encyclopedia)school, term commonly referring to institutions of pre-college formal education. It also properly includes colleges, universities, and many types of special training establishments (see adult educatio...

antibiotic

(Encyclopedia)antibiotic, any of a variety of substances, usually obtained from microorganisms, that inhibit the growth of or destroy certain other microorganisms. Although for centuries preparations derived from ...

breast cancer

(Encyclopedia)breast cancer, cancer that originates in the breast. Breast cancer is the second leading cause of cancer death in women (following lung cancer). Although the vast majority of the cases occur in women,...

Arthropoda

(Encyclopedia)Arthropoda ärthrŏpˈədə [key] [Gr.,=jointed feet], largest and most diverse animal phylum. The arthropods include crustaceans, insects, centipedes, millipedes, spiders, scorpions, and the extinct ...

Indo-Iranian

(Encyclopedia)Indo-Iranian, subfamily of the Indo-European family of languages, spoken by more than a billion people, chiefly in Afghanistan, Bangladesh, India, Iran, Nepal, Pakistan, and Sri Lanka (see The Indo-Eu...

Hong Kong

(Encyclopedia)CE5 Hong Kong hŏng kŏng [key], Mandarin Xianggang, special administrative region of China, formerly a British crown colony (2015 est. pop. 7,246,000), land area 422 sq mi (1,092 sq km), adjacent ...