disk (disk) a circular or rounded flat plate. Spelled also disc.
articular disk,
articular disk a pad of fibrocartilage or dense fibrous tissue present in some synovial joints.
Bowman's disks flat, disklike plates making up striated muscle fibers.
choked disk papilledema.
ciliary disk the thin part of the ciliary body.
contained disk protrusion of a nucleus pulposus in which the anulus fibrosus remains intact.
cupped disk a pathologically depressed optic disk.
extruded disk herniation of the nucleus pulposus through the anulus fibrosus, with the nuclear material remaining attached to the intervertebral disk.
gelatin disk a disk or lamella of gelatin variously medicated, used chiefly in eye diseases.
growth disk epiphyseal plate.
Hensen's disk H band.
herniated disk herniation of intervertebral disk; see under herniation.
intervertebral disks layers of fibrocartilage between the bodies of adjacent vertebrae.
intra-articular disks fibrous structures within the capsules of diarthrodial joints.
noncontained disk herniation of the nucleus pulposus with rupture of the anulus fibrosus.
optic disk the intraocular part of the optic nerve formed by fibers converging from the retina and appearing as a pink to white disk; because there are no sensory receptors in the region, it is not sensitive to stimuli. 
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Discus opticus (optic disk).
Placido's disk a disk marked with concentric circles, used in examining the cornea.
protruded disk , ruptured disk herniation of intervertebral disk; see under herniation.
sequestered disk a free fragment of the nucleus pulposus in the spinal canal outside of the anulus fibrosus and no longer attached to the intervertebral disk.
slipped disk popular term for herniation of an intervertebral disk; see under herniation.
| articular disk n. A plate or ring of fibrocartilage attached to the joint capsule and separating the articular surfaces of the bones. Also called interarticular cartilage, interarticular fibrocartilage. |
articular disk,
1 a small oval plate between the condyle of the mandible and the mandibular fossa. Displacement of or injury to the plate may be a cause of temporomandibular joint (TMJ) pain.
2 the platelike cartilaginous end of certain bones in movable joints, sometimes closely associated with surrounding muscles or with cartilage.
disk
a circular or rounded flat plate. See also intervertebral disk.
articular disk
a pad of fibrocartilage or dense fibrous tissue present in some synovial joints. As specialized intra-articular structures they differ from articular plates in that they have nerve and blood supplies.
choked disk
papilledema.
embryonic disk
a flattish area in a cleaved ovum in which the first traces of the embryo are seen. Called also germinal disk.
disk explosion
the lesion produced by a sudden extrusion of non-degenerate nucleus pulposus from intervertebral disks into the cervical vertebral canal as a result of trauma.
germinal disk
the embryo in a hen egg.
intra-articular disk
articular disk.
olfactory disk
these develop on the ventrolateral aspects of the head early in fetal development. They deepen, are surrounded by the developing nasal processes, then break through into the oral cavity and become the nasal cavities.
slipped disk
the popular name for prolapse of the nucleus of an intervertebral disk.
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