platelet count determination of the total number of platelets per cubic millimeter of blood; the direct platelet count simply counts the cells using a microscope, and the indirect platelet count determines the ratio of platelets to erythrocytes on a peripheral blood smear and computes the number of platelets from the erythrocyte count.
The modern spinner device is a decorative kinetic attachment to the wheel of an automobile. The spinner covers the center of a car's wheel and is designed to independently rotate by using one or more roller bearings to isolate the spinner from the wheel, enabling it to turn while the wheel is at rest.
Twister is a game of physical skill, produced by Milton Bradley Company and Winning Moves, that has been inducted into the American National Toy Hall of Fame. It is played on a large plastic mat that is spread on the floor or ground. The mat has six rows of large colored circles on it with a different color in each row: red, yellow, green, and blue. A spinner is attached to a square board and is used to determine where the player has to put their hand or foot. The spinner is divided into four la