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air forces

(Encyclopedia)air forces, those portions of a nation's military organization employing heavier-than-air aircraft for reconnaissance, support of ground troops, aerial combat, and bombing of enemy lines of communicat...

book

(Encyclopedia)book. The word book has come to have many meanings, e.g., any collection of sheets of paper, wood, or other material sewn or bound together; a division of a written work (books of the Bible, books of ...

Cnidaria

(Encyclopedia)CE5 Internal anatomy of Hydra, representative of the phylum Cnidaria Cnidaria səlĕntəräˈtə [key], phylum of invertebrate animals comprising the sea anemones, corals, jellyfish, and hydroids....

coenzyme

(Encyclopedia)coenzyme kō-ĕnˈzīm [key], any one of a group of relatively small organic molecules required for the catalytic function of certain enzymes. A coenzyme may either be attached by covalent bonds to a ...

dictionary

(Encyclopedia)dictionary, published list, in alphabetical order, of the words of a language. In monolingual dictionaries the words are explained and defined in the same language; in bilingual dictionaries they are ...

dinosaur

(Encyclopedia)dinosaur dīˈnəsôr [key] [Gr., = terrible lizard], extinct land reptile of the Mesozoic era. The dinosaurs, which were egg-laying animals, ranged in length from 21⁄2 ft (91 cm) to about 127 f...

Transylvania

(Encyclopedia)Transylvania trănˌsĭlvāˈnyə [key], Rom. Transilvania or Ardeal, Hung. Erdély, Ger. Siebenbürgen, historic region and province (21,292 sq mi/55,146 sq km), central Romania. A high plateau, Tran...

Beijing

(Encyclopedia)Beijing pē-kĭng, pā– [key], city and independent municipality (2021 est. pop. 20,897,000), ...

Oman

(Encyclopedia)CE5 Oman ōmänˈ [key], officially Sultanate of Oman, independent sultanate (2015 est. pop. 3,287,000), c.82,000 sq mi (212,380 sq km), SE Arabian peninsula, on the Gulf of Oman and the Arabian Se...

Paleolithic art

(Encyclopedia)Paleolithic art pāˌlēəlĭthˈĭk, –lēō–, pălˌ– [key], art produced during the Paleolithic period. Study and knowledge of this art largely have been confined to works discovered at many s...