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endometriosis
(Encyclopedia) endometriosisendometriosisĕnˌdəmēˌtrē-ōˈsĭs [key], a condition in which small pieces of the endometrium (the lining of the uterus) migrate to other places in the pelvic area. The…atomic force microscope
(Encyclopedia) atomic force microscope (AFM), device that uses a spring-mounted probe to image individual atoms on the surface of a material, first developed by Gerd Binnig in 1986. Unlike the…thymus gland
(Encyclopedia) thymus glandthymus glandthīˈməs [key], mass of glandular tissue located in the neck or chest of most vertebrate animals. In humans, the thymus is a soft, flattened, pinkish-gray organ…mirror
(Encyclopedia) mirror, in optics, a reflecting surface that forms an image of an object when light rays coming from that object fall upon it (see reflection). Usually mirrors are made of plate glass…Angus cattle
(Encyclopedia) Angus cattleAngus cattleăngˈgəs [key], breed of black polled (hornless) beef cattle, originated in Scotland and introduced in 1873 to the United States, where they have become well…Merino sheep
(Encyclopedia) Merino sheepMerino sheepmərēˈnō [key], breed intermediate in body size having fine wool, developed in Spain. These sheep are noted for their hardiness and their herding instincts and…cline
(Encyclopedia) cline, in biology, any gradual change in a particular characteristic of a population of organisms from one end of the geographical range of the population to the other. Gradients of…Lagoon Nebula
(Encyclopedia) Lagoon Nebula, bright, diffuse nebula in the southern constellation Sagittarius; cataloged as M8 or NGC 6526. It is visible to the naked eye and has an angular area larger than that of…No, lake, South Sudan
(Encyclopedia) NoNonō [key], lake, N South Sudan, in the swampy Sudd region. It is formed by the floodwaters of the White Nile and varies in size seasonally. Its maximum area is c.40 sq mi (100 sq km…Brasher, Rex
(Encyclopedia) Brasher, RexBrasher, Rexbrāˈshər [key], 1869–1960, American artist and naturalist, b. Brooklyn, N.Y., grad. St. Francis College, Brooklyn, 1884. A self-taught artist, he devoted his…Trending
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