(1):
(n.) A flat, circular plate; as, a disk of metal or paper.
(2):
(n.) The central part of a radiate compound flower, as in sunflower.
(3):
(n.) A discus; a quoit.
(4):
(n.) A part of the receptacle enlarged or expanded under, or around, or even on top of, the pistil.
(5):
(n.) The circular figure of a celestial body, as seen projected of the heavens.
(6):
(n.) A circular structure either in plants or animals; as, a blood disk; germinal disk, etc.
(7):
(n.) The whole surface of a leaf.
(8):
(n.) In owls, the space around the eyes.
(9):
(n.) The anterior surface or oral area of coelenterate animals, as of sea anemones.
(10):
(n.) The lower side of the body of some invertebrates, especially when used for locomotion, when it is often called a creeping disk.