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