Definify.com
Webster 1913 Edition
Disk
1.
A discus; a quoit.
Some whirl the
disk
, and some the javelin dart. Pope.
2.
A flat, circular plate;
as, a
. disk
of metal or paper3.
(Astron.)
The circular figure of a celestial body, as seen projected of the heavens.
4.
(Biol.)
A circular structure either in plants or animals;
as, a blood
disk
; germinal disk
, etc.5.
(Bot.)
(a)
The whole surface of a leaf.
(b)
The central part of a radiate compound flower, as in sunflower.
(c)
A part of the receptacle enlarged or expanded under, or around, or even on top of, the pistil.
6.
(Zool.)
(a)
The anterior surface or oral area of cœlenterate animals, as of sea anemones.
(b)
The lower side of the body of some invertebrates, especially when used for locomotion, when it is often called a creeping disk.
(c)
In owls, the space around the eyes.
Disk engine
, a form of rotary steam engine.
– Disk shell
(Zool.)
, any species of Discina.
Webster 1828 Edition
Disk
DISK
,Noun.
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.