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 the cervix and surgical removal of the contents of the uterus
 * Dilation and evacuation, the dilation of the cervix and evacuation of the contents of the uterus
 * Esophageal dilation, a procedure for widening a narrowed esophagus
 * Pupillary dilation (also called mydriasis), the widening of the pupil of the eye
 * Vasodilation, the widening of luminal diameter in blood vessels

Mathematics

 * Dilation (affine geometry), an affine transformation
 * Dilation (metric space), a function from a metric space into itself
 * Dilation (operator theory), a dilation of an operator on a Hilbert space
 * Dilation (morphology), an operation in mathematical morphology
 * Scaling (geometry), including:
 * Homogeneous dilation (homothety), the scalar multiplication operator on a vector space or affine space
 * Inhomogeneous dilation, where scale factors may differ in different directions

Chemistry and physics

 * Dilation (physics), size increase
 * Thermal expansion of crystalline triglycerides is referred to as dilation
 * Scale invariance, a feature of objects or laws that do not change if length scales (or energy scales) are multiplied by a common factor
 * Time dilation, 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), ambient solo project of Vampire Rodents keyboardist Victor Wulf
 * Dilation (album), 2011 album by comedian Rory Scovel