Asteroids are celestial rocky bodies that orbit the sun. It was Sir William Herschel who first coined the term âasteroidâ (Greek for star-like) in 1802. He thought that Ceres and Pallas, discovered in 1801 by Giuseppe Piazzi and Heinrich Olbers respectively, were too small and were remnants of a destroyed planet.
blood cell. n. Any of the cells contained in blood; an erythrocyte or leukocyte; a blood corpuscle. blood cell. n. (Physiology) any of the cells that circulate in the blood. See erythrocyte, leucocyte.
A plasma cell is a type of white blood cell that normally produces antibodies to fight infections. People with multiple myeloma have cancerous plasma cells, also called myeloma cells, which replace normal cells and form tumors in bones and, occasionally, in various soft tissues of the body. Myeloma cells may also prevent the bone marrow from making enough red blood cells, white blood cells, and platelets.