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.
Medical Definition of RED BLOOD CELL. : any of the hemoglobin-containing cells that carry oxygen to the tissues and are responsible for the red color of vertebrate bloodâcalled also erythrocyte, red blood corpuscle, red cell, red corpuscle; compare white blood cell. any of the hemoglobin-containing cells that carry oxygen to the tissues and are responsible for the red color of vertebrate blood âcalled also erythrocyte, red blood corpuscle, red cell, red corpuscle. See red blood cell defined for English-language learners. See red blood cell defined for kids.