1. A round, flat plate; any approximately flat circular structure. 2. SYN: lamella (2). 3. In dentistry, a circular piece of thin paper or other material, coated with an abrasive substance, used for cutting and polishing teeth and fillings. [L. discus; G. diskos, a quoit, d.]
- A disks SYN: A bands, under band.
- Airy d. the image of a circular blur formed by a distant point source of light on the retina because of diffraction by the edge of the pupillary aperture where the diameter of the image decreases as the aperture increases.
- anisotropic disks SYN: A bands, under band.
- articular d. [TA] a plate or ring of fibrocartilage attached to the joint capsule and separating the articular surfaces of the bones for a varying distance, sometimes completely; it serves to adapt two articular surfaces that are not entirely congruent. SYN: discus articularis [TA], fibrocartilago interarticularis, fibroplate, interarticular fibrocartilage, intraarticular cartilage (1).
- articular d. of acromioclavicular joint [TA] the articular d. of fibrocartilage usually found between the acromial end of the clavicle and the medial border of the acromion. SYN: discus articularis acromioclavicularis [TA], acromioclavicular d., Weitbrecht cartilage.
- articular d. of distal radioulnar joint [TA] the d. that holds together the distal ends of the radius and ulna; it is attached by its apex to a depression between the styloid process and distal surface of the head of the ulna, and by its base to the ridge separating the ulnar notch from the carpal surface of the radius. SYN: discus articularis radioulnaris distalis [TA], radioulnar d., radioulnar articular d., triangular cartilage, triangular d. of wrist, triquetrous cartilage (1).
- articular d. of sternoclavicular joint [TA] the fibrocartilaginous d. that subdivides the sternoclavicular joint into two cavities. SYN: discus articularis sternoclavicularis [TA], sternoclavicular d., sternoclavicular articular d..
- articular d. of temporomandibular joint [TA] the fibrocartilaginous plate that separates the joint into upper and lower cavities. SYN: discus articularis temporomandibularis [TA], mandibular d., temporomandibular articular d..
- blastodermic d. the aggregation of blastomeres of a telolecithal ovum after cleavage has occurred.
- blood d. SYN: platelet.
- Bowman disks disks resulting from transverse segmentation of striated muscular fiber treated with weak acids, certain alkaline solutions, or freezing.
- Burlew d. an abrasive-impregnated rubber wheel used in dentistry for polishing. SYN: Burlew wheel.
- choked d. SYN: papilledema.
- cone disks membranous disks of flattened sacs about 14 nm thick that occur in the outer segment of cones of the retina.
- cuttlefish d. a circle of paper or thin plastic coated with ground cuttlefish bone; used, when attached to a mandrel and rotated by a dental handpiece, for fine smoothing and finishing of dental materials and tooth.
- diamond d. a steel d. with the cutting surface(s) covered with fine diamond chips, for use in a dental handpiece.
- embryonic d. SYN: germinal d..
- emery disks disks of paper or other materials coated with emery powder used to abrade or smooth the surface of teeth or fillings.
- germinal d., germ d. the point in a telolecithal ovum where the embryo begins to be formed. SYN: embryonic d., germinal area, area germinativa.
- H d. SYN: H band.
- hair d. a richly innervated area of skin around a hair follicle, consisting of a thickened layer of epithelial cells in which ramify unmyelinated terminals of a single axon.
- Hensen d. SYN: H band.
- herniated d. protrusion of a degenerated or fragmented intervertebral d. into the intervertebral foramen with potential compression of a nerve root or into the spinal canal with potential compression of the cauda equina in the lumbar region or the spinal cord at higher levels. SYN: protruded d., ruptured d..
- I d. SYN: I band.
- intercalated d. a specialized intercellular attachment of cardiac muscle comprising gap junctions, fascia adherens, and occasionally desmosomes.
- intermediate d. SYN: Z line.
- interpubic d. SYN: interpubic d..
- intervertebral d. a d. interposed between the bodies of adjacent vertebrae. It is composed of an outer fibrous part (annulus fibrosus) that surrounds a central gelatinous mass (nucleus pulposus). SYN: discus intervertebralis [TA], fibrocartilago intervertebralis, intervertebral cartilage.
- isotropic d. SYN: I band.
- Merkel tactile d. SYN: tactile meniscus.
- Newton d. a d. on which are seven colored sectors, each occupying proportionally the same space as the corresponding primary color in the spectrum; when the d. is rapidly rotated it appears white.
- optic d. [TA] an oval area of the ocular fundus devoid of light receptors where the axons of the retinal ganglion cell converge to form the optic nerve head; SYN: discus nervi optici [TA], blind spot (3), Mariotte blind spot, optic nerve head, optic papilla, papilla nervi optici, porus opticus.
- proligerous d. SYN: cumulus oöphorus.
- protruded d. SYN: herniated d..
- Q disks SYN: A bands, under band.
- Ranvier disks tactile nerve endings, of cupped disklike form, in the skin.
- rod disks membranous disks of flattened sacs about 14 nm thick that occur in the outer segment of rods of the retina.
- ruptured d. SYN: herniated d..
- sacrococcygeal d. a thin plate of fibrocartilage interposed between the sacrum and coccyx.
- sandpaper disks disks of paper coated with various grits of silica; used to abrade or smooth the surface of teeth or dental materials.
- stenopeic d., stenopaic d. a metallic or other opaque d. with a narrow slit through which one looks; used as a test for astigmatism.
- stroboscopic d. a revolving d. that gives successive views of a moving object.
- tactile d. SYN: tactile meniscus.
- transverse d. one of the dark transverse bands seen on examining a striated muscular fiber under the microscope.
- triangular d. of wrist SYN: articular d. of distal radioulnar joint.
- Z d. SYN: Z line.

* * *

disk or disc 'disk n any of various rounded or flattened anatomical structures: as
a) a mammalian blood cell

* * *

(disk) [L. discus quoit, from Gr. diskos] a circular or rounded flat plate; spelled also disc. See also subentries under disc.

Medical dictionary. 2011.

Игры ⚽ Нужно сделать НИР?
, / (of the sun, moon, etc.) / ,

Look at other dictionaries:

  • Disk II — drives. The Disk II Floppy Disk Subsystem was a 5¼ inch floppy disk drive designed by Steve Wozniak and manufactured by Apple Computer. It was first introduced in 1978 at a retail price of US$495 for pre order; it was later sold for $595… …   Wikipedia

  • Disk’O — in Aktion Disk’O in …   Deutsch Wikipedia

  • Disk'O — Disk’O Coaster in Fraispertuis City Disk’O (andere Namen: Mega Disk’O, Disk’O Coaster) ist ein 2003 entworfenes Fahrgeschäft der italienischen Firma Zamperla. Die Insassen sitzen auf einer kreisförmigen Plattform mit nach außen gerichteten… …   Deutsch Wikipedia

  • Disk-O — Disk’O Coaster in Fraispertuis City Disk’O (andere Namen: Mega Disk’O, Disk’O Coaster) ist ein 2003 entworfenes Fahrgeschäft der italienischen Firma Zamperla. Die Insassen sitzen auf einer kreisförmigen Plattform mit nach außen gerichteten… …   Deutsch Wikipedia

  • Disk'O — Coaster La Cavalerie, Disk O de Fraispertuis City. Le Disk O, le Mega Disk O et le Disk O Coaster sont des modèles d attraction créés en 2003 et construits par Zamperla. Ces attractions existent en version fixe pour les parcs d attractions et …   Wikipédia en Français

  • disk — [dɪsk] noun [countable] a flat circular piece of plastic or metal used for storing computer information COMPUTING : • There are a number of products which allow PC disks to be read or written from a Macintosh. • Can you send me your report on… …   Financial and business terms

  • Disk-O — Disk O/ Skater is a Zamperla flat ride. Riders sit on a circular platform with outward facing seats (Disk O) [or in a long, normal gondola looking inwards (Skater)] , and rock back and forth while spinning. It is a larger version of a Rockin Tug …   Wikipedia

  • Disk — (d[i^]sk), n. [L. discus, Gr. di skos. See {Dish}.] [Written also {disc}.] 1. A discus; a quoit. [1913 Webster] Some whirl the disk, and some the javelin dart. Pope. [1913 Webster] 2. A flat, circular plate; as, a disk of metal or paper. [1913… …   The Collaborative International Dictionary of English

  • Disk — (amerikanisches Englisch für Scheibe oder Platte) und Disc (britisches Englisch, gleiche Bedeutung) haben die gleiche Bedeutung, werden aber in unterschiedlichen Kontexten angewandt. Disk bezeichnet in der EDV magnetische drehende Speicher oder… …   Deutsch Wikipedia

  • disk — dȉsk m <N mn ovi> DEFINICIJA 1. tanja ploča okrugla oblika posebne namjene (npr. u automobilskim kočnicama); diskos 2. anat. pločica izgrađena od hrskavice ili vezivnog tkiva koja se nalazi između dvaju zglobnih tijela (npr. u kralješnici)… …   Hrvatski jezični portal

  • disk — W3S2 [dısk] n [Date: 1600 1700; : Latin; Origin: discus disk, plate ] 1.) a small flat piece of plastic or metal which is used for storing computer or electronic information 2.) the usual American spelling of ↑disc →↑compact disc, ↑ …   Dictionary of contemporary English

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”