Dilation

Dilation (or dilatation) may refer to:

Physiology or medicine

• Pupillary dilation, dilation of the pupil of the eye
• Cervical dilation, the widening of the cervix in childbirth, miscarriage etc.
• 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 dilatation, a procedure for widening a narrowed esophagus
• 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

• 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