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Rh factor
(Encyclopedia)Rh factor, protein substance present in the red blood cells of most people, capable of inducing intense antigenic reactions. The Rh, or rhesus, factor was discovered in 1940 by K. Landsteiner and A. S...polycythemia
(Encyclopedia)polycythemia pŏlˌēsīthēˈmēə [key], condition characterized by an increase in the production of red blood cells, or erythrocytes, in the blood. Primary polycythemia, also called erythremia, or ...garnet
(Encyclopedia)garnet, name applied to a group of isomorphic minerals crystallizing in the cubic system. They are used chiefly as gems and as abrasives (as in garnet paper). The garnets are double silicates; one of ...Rhode Island Red chicken
(Encyclopedia)Rhode Island Red chicken, American breed of poultry, no longer raised commercially, but still maintained for use in breeding programs. See Red Rock chicken. ...Duroc swine
(Encyclopedia)Duroc swine dŭˈrŏk, do͞oˈ– [key], breed originating during the 1800s in the NE United States from crosses among a number of red strains existing in that region. One of the most numerous breeds,...alizarin
(Encyclopedia)alizarin əlĭzˈərĭn [key], or 1,2-dihydroxyanthraquinone, mordant vegetable dye obtained originally from the root of the madder plant (Rubia tinctorum), in which it occurs as a glucoside. The term...Irish terrier
(Encyclopedia)Irish terrier, a breed of hardy working terrier developed in the British Isles and believed to be one of the oldest terriers. It stands about 18 in. (46 cm) high at the shoulder and weighs from 25 to ...Red Angus cattle
(Encyclopedia)Red Angus cattle: see Angus cattle. ...red blood cell
(Encyclopedia)red blood cell: see blood.Red River Rebellion
(Encyclopedia)Red River Rebellion: see Riel, Louis. ...Browse by Subject
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