disc
A disk is a geometric body in the form of a cylinder , the radius (r) of which is many times greater than its thickness (z). If the thickness is zero, a two-dimensional element is obtained, which is called a circular disk or circular area.
Beyond this mathematically strict definition, the term extends to a variety of flat objects, overlapping with that of the plate .
In technology and construction
In technology, washers with a concentric , hollow-cylindrical recess or a corresponding bore are often used ( washer ). Disks, the edge of which is many times thinner in relation to the central recess, are commonly referred to as a ring . The demarcation between cylinder, disk, plate, ring and similar terms is not precisely defined and in many cases depends on the context.
In particular, there are in this area:
Concrete
- Brake disc - abrasion-resistant disc of a brake ( disc brake )
- Spacer washer - general form of the standardized washer
-
Glass pane and window pane - transparent material made of organic or mineral glass ; window of unspecified shape derived therefrom:
- Focusing screens for optical display purposes
- Separating window (JVA) - a security window (penal system or bank counter)
- Perforated disc - disc with at least one axially parallel hole
- Shim - washer of a defined thickness in mechanical engineering, is required to compensate for manufacturing tolerances, for example to get shafts and bearings free of play.
- Silicon wafer ( wafer )
- Cutting wheel , grinding wheel - for grinding or cutting materials
- Washer (washer) - to the pressure distribution on a screw or nut
abstract
- In technical mechanics, a flat surface structure is called a disk if it is only loaded by forces in its plane, see disk (technical mechanics) . This is what disk theory deals with .
Named after the disc-shaped core component
- Disk laser - solid-state laser with disk-shaped active medium
- Disc trimmer - variable capacitor , consisting of a rotatable ceramic disc
- Disc capacitor - capacitor made from a disc-shaped dielectric
- Disc triode - electron tube with a disc-shaped electrode structure
- Jecklin disk - a two-channel microphone arrangement with a disk as a separator .
Outside of technology
- generally a cut flat piece of a material, for example food cut with a cutting machine (bread, sausage, cheese slices etc.)
- Accretion Disk and Protoplanetary Disk - Astronomical Objects
- Intervertebral disc - a disc of cartilage between the vertebrae of the spine
- Discus disc - sports equipment, from Latin discus 'disc'
- Earth disk - the early idea that the earth was a disk
- Disk - as a (colloquial) term for records and music CDs
Colloquially, disk or disk paste or disk honey is an escape word for the most commonly used German curse .
See also
- Discworld , a fictional universe
Web links
- Disc in Duden
- Kathrin Kunkel-Razum: Dictionary of German as a Foreign Language: The monolingual dictionary for courses in elementary and intermediate level, p. 512 online
Individual evidence
- ↑ Disc honey in the dictionary
- ↑ Oksana Havryliv: Verbal Aggression: form and function using the example of the Viennese, p 156 Online
- ↑ Heike Olschansky: Deceptive words: small lexicon of folk etymologies