a. [ L. rubefaciens, p. pr. of rubefacere to make red; rubere to be red + facere to make. ] Making red. -- n. (Med.) An external application which produces redness of the skin. [ 1913 Webster ]
‖n. [ NL., fr. L. rubellus reddish. ] (Med.) An acute but mild viral infection characterized by a dusky red cutaneous eruption resembling that of measles, but attended by only mild respiratory problems or fever; -- called also German measles. The infective virus is called Rubella virus, or Rubivirus. If contracted by a woman during the first several months of pregnancy, rubella may cause serious abnormalities in the fetus. [ 1913 Webster +PJC ]
n. [ L. rubellus reddish, dim. of ruber red. ] (Min.) A variety of tourmaline varying in color from a pale rose to a deep ruby, and containing lithium. [ 1913 Webster ]
a. [ L. ruber red + erythrin. ] (Chem.) Pertaining to, or designating, an acid extracted from madder root. It is a yellow crystalline substance from which alizarin is obtained. [ 1913 Webster ]
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