Disk, n.

noun

n. [Gr. δίσκος, Lat. dĭscus, Fr. disque, It. & Sp. disco. See Desk and Dish.] [Often written disc.]

  1. A flat, circular plate; as, a disk of metal, or of paper.
  2. A discus; a quoit.

Some whirl the disk; and some the javelin dart. Pope.

  1. (Astron.) The face or visible projection of a celestial body.
  2. (Bot.) (a.) The whole surface of a leaf. (b.) The central part of a radiate compound flower. (c.) A part of the receptacle enlarged or expanded under or around the pistil.
A daisy-like flower is shown with its central disk and surrounding rays labeled.
d, disk; r, r, rays.