Dilation wiktionary:dilation, Dilation (or dilatation) may refer to: Physiology or medicine * Cervical dilation, the widening of the cervix in childbirth, miscarriage etc. * Coronary dilation, or coronary reflex * Dilation and curettage, the opening of ...

(or dilatation) may refer to:

Physiology or medicine

Cervical dilation Cervical dilation (or cervical dilatation) is the opening of the cervix, the entrance to the uterus, during childbirth, miscarriage, induced abortion, or gynecological surgery. Cervical dilation may occur naturally, or may be induced surgically ...

, the widening of the cervix in childbirth, miscarriage etc. *

Coronary dilation Coronary reflex is the change of coronary diameter in response to chemical, neurological or mechanical stimulation of the coronary arteries. The coronary reflexes are stimulated differently from the rest of the vascular system. Causes of coronary c ...

, or coronary reflex *

Dilation and curettage Dilation (or dilatation) may refer to: Physiology or medicine * Cervical dilation, the widening of the cervix in childbirth, miscarriage etc. * Coronary dilation, or coronary reflex * Dilation and curettage, the opening of the cervix and s ...

, the opening of the cervix and surgical removal of the contents of the uterus *

Dilation and evacuation Dilation and evacuation (D&E) or dilatation and evacuation (British English) is the dilation of the cervix and surgical evacuation of the uterus (potentially including the fetus, placenta and other tissue) after the first trimester of pregnancy. I ...

, the dilation of the cervix and evacuation of the contents of the uterus *

Esophageal dilation Esophageal dilation or oesophageal dilatation (British English) is a therapeutic endoscopic procedure that enlarges the lumen of the esophagus. Indications It can be used to treat a number of medical conditions that result in narrowing of the es ...

, a procedure for widening a narrowed esophagus *

Pupillary dilation Pupillary response is a physiological response that varies the size of the pupil between 1.5 mm and 8 mm, via the optic and oculomotor cranial nerve. A constriction response (miosis), is the narrowing of the pupil, which may be caused by scler ...

(also called mydriasis), the widening of the pupil of the eye *

Vasodilation Vasodilation, also known as vasorelaxation, is the widening of blood vessels. It results from relaxation of smooth muscle cells within the vessel walls, in particular in the large veins, large arteries, and smaller arterioles. Blood vessel wa ...

, the widening of luminal diameter in blood vessels

Mathematics

Dilation (affine geometry) In mathematics, a homothety (or homothecy, or homogeneous dilation) is a Transformation (mathematics), transformation of an affine space determined by a point called its ''center'' and a nonzero number called its ''ratio'', which sends point ...

, an affine transformation *

Dilation (metric space) In mathematics, a dilation is a function f from a metric space M into itself that satisfies the identity :d(f(x),f(y))=rd(x,y) for all points x, y \in M, where d(x, y) is the distance from x to y and r is some positive real number. In Euclidean s ...

, a function from a metric space into itself *

Dilation (operator theory) In operator theory, a dilation of an operator ''T'' on a Hilbert space ''H'' is an operator on a larger Hilbert space ''K'', whose restriction to ''H'' composed with the orthogonal projection onto ''H'' is ''T''. More formally, let ''T'' be a boun ...

, a dilation of an operator on a Hilbert space *

Dilation (morphology) Dilation (usually represented by ⊕) is one of the basic operations in mathematical morphology. Originally developed for binary images, it has been expanded first to grayscale images, and then to complete lattices. The dilation operation usually u ...

, an operation in mathematical morphology *

Scaling (geometry) In affine geometry, uniform scaling (or isotropic scaling) is a linear transformation that enlarges (increases) or shrinks (diminishes) objects by a '' scale factor'' that is the same in all directions ( isotropically). The result of uniform s ...

, including: ** Homogeneous dilation (

homothety In mathematics, a homothety (or homothecy, or homogeneous dilation) is a transformation of an affine space determined by a point called its ''center'' and a nonzero number called its ''ratio'', which sends point to a point by the rule, : \o ...

), the scalar multiplication operator on a vector space or affine space **

Inhomogeneous dilation In affine geometry, uniform scaling (or isotropic scaling) is a linear transformation that enlarges (increases) or shrinks (diminishes) objects by a '' scale factor'' that is the same in all directions ( isotropically). The result of uniform sc ...

, where scale factors may differ in different directions

Chemistry and physics

Dilation (physics) In mechanics, compression is the application of balanced inward ("pushing") forces to different points on a material or structure, that is, forces with no net sum or torque directed so as to reduce its size in one or more directions.Ferdinand ...

, size increase *

Thermal expansion Thermal expansion is the tendency of matter to increase in length, area, or volume, changing its size and density, in response to an increase in temperature (usually excluding phase transitions). Substances usually contract with decreasing temp ...

of crystalline triglycerides is referred to as dilation *

Scale invariance In physics, mathematics and statistics, scale invariance is a feature of objects or laws that do not change if scales of length, energy, or other variables, are multiplied by a common factor, and thus represent a universality. The technical term ...

, a feature of objects or laws that do not change if length scales (or energy scales) are multiplied by a common factor *

Time dilation Time dilation is the difference in elapsed time as measured by two clocks, either because of a relative velocity between them (special relativity), or a difference in gravitational potential between their locations (general relativity). When unsp ...

, the observation that another's clock is ticking at a slower rate as measured by one's own clock

Music

* ''Dilate'' (Bardo Pond album) * ''Dilate'' (Ani DiFranco album) *

Dilate (musical project) Dilate was an ambient solo project begun in 1996 by composer and synthesizer player Victor Wulf, formerly of the sound collage and industrial music band Vampire Rodents. Wulf released the studio album's '' Cyclos'' and ''Octagon'' for Hypnot ...

, ambient solo project of Vampire Rodents keyboardist Victor Wulf * ''Dilation'' (album), 2011 album by comedian Rory Scovel * ''Dialate,'' 1996 song by Linkin Park

Physiology or medicine

Mathematics

Chemistry and physics

Music

See also