Noah Webster
Disk
DISK, noun [Latin See Dish and Desk.]
1. The body and face of the sun, moon or a planet, as it appears to us on the earth; or the body and face of the earth, as it appears to a spectator in the moon.
2. A quoit; a piece of stone, iron or copper, inclining to an oval figure, which the ancients hurled by the help of a leathern thong tied round the persons hand, and put through a hole in the middle.
Some whirl the disk and some the javlin dart.
3. In botany, the whole surface of a leaf; the central part of a radiate compound flower.