(Encyclopedia) chloramphenicolchloramphenicolklōrˌămfĕnˈəkŏlˌ [key], antibiotic effective against a wide range of gram-negative and gram-positive bacteria (see Gram's stain). It was originally…
(Encyclopedia) Eustachian tubeEustachian tubey&oomacr;stāˈshən [key] [for Bartolomeo Eustachi], a hollow structure of bone and cartilage extending from the middle ear to the rear of the throat,…
(Encyclopedia) polycythemiapolycythemiapŏlˌēsīthēˈmēə [key], condition characterized by an increase in the production of red blood cells, or erythrocytes, in the blood. Primary polycythemia, also…
(Encyclopedia) palatepalatepălˈĭt [key], roof of the mouth. The front part, known as the hard palate, formed by the upper maxillary bones and the palatine bones, separates the mouth from the nasal…
(Encyclopedia) elephant bird, extinct, flightless bird of the family Aepyornithidae. Once native to the island of Madagascar, these gigantic birds may have survived until as late as 1649. Today, they…
(Encyclopedia) Annaba Annaba ăn-näbˈə [key], formerly Bône (bōn), city, capital of Annaba prov., extreme NE Algeria, a port on the Mediterranean Sea. One of the country's…
(Encyclopedia) button, knoblike appendage used on wearing apparel either for ornament or for fastening. Although buttons were sometimes used as fasteners by Greeks and Romans, they were more often…
(Encyclopedia) WindhoekWindhoekvĭntˈh&oomacr;k [key], city (1991 pop. 147,056), capital of Namibia. It is Namibia's largest city and its administrative, communications, and economic center.…
You can't get much older than 6 million years. That is when the first human beings, known as Hominidae, evolved. They were not like apes; they had bigger brains, different teeth, and walked…
From ancient times to the present, certain birds have been considered both symbols and forecasters of events. These eight birds, from every part of the world, have been especially important.…
