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.
Noun. 1. red blood cell-a mature blood cell that contains hemoglobin to carry oxygen to the bodily tissues; a biconcave disc that has no nucleus. erythrocyte, RBC. blood cell, blood corpuscle, corpuscle-either of two types of cells (erythrocytes and leukocytes) and sometimes including platelets.oun. 1. red blood cell-a mature blood cell that contains hemoglobin to carry oxygen to the bodily tissues; a biconcave disc that has no nucleus. erythrocyte, RBC. blood cell, blood corpuscle, corpuscle-either of two types of cells (erythrocytes and leukocytes) and sometimes including platelets.