dilation

Opening up wider

Dilation is the act of expanding or widening something, or the state of being expanded.

In medicine, it typically refers to the enlargement of an opening or hollow structure: The doctor checked for cervical dilation during labor, The eye drops cause pupil dilation.

In mathematics, dilation is a transformation that enlarges or reduces a figure while preserving its shape.

The word can also describe expansion more broadly: time dilation in physics, the dilation of blood vessels.

expansion

widening

Increasing in extent

stretching · distension · opening · amplification · increase · swelling · augmentation · magnification · spreading · diffusion

pupil

eye drops

Topical ocular medication

  • atropineAnticholinergic alkaloid medication
  • pupilLearner or eye opening
  • irisEye's pigmented disc

miosis · constriction · photophobia · accommodation · arousal

cervical

labor

Strenuous effort; also childbirth

centimeters · delivery · obstetrics · midwife · epidural · membrane · birth canal · active labor · transition · induced

vascular

blood vessels

Tubes carrying circulating fluid

veins · capillaries · nitric oxide · circulation · hypotension · flushing · warmth · nitroglycerin · smooth muscle · peripheral

time

prolongation

Act of extending duration

expansion · delay · drawn-out · protraction · relativity · slowing · temporal

cardiac

heart

Circulatory system's pump

echocardiogram · systole · diastole · hypertrophy · atrium · heart failure · enlarged · congestive · myocardium

Categories
Opposites
physical expansion/contraction

dilationcontraction

Reduction in size

constriction · compression · shrinkage · narrowing · condensation

medical/physiological opening

dilationconstriction

Tightening or narrowing action

contraction · stenosis · narrowing · vasoconstriction · miosis

temporal/content expansion

dilationabridgment

Shortened form of text

condensation · abbreviation · compression · contraction · shortening

Phrases
Family

dilating, dilations

Familiarity
Top 100,000
Profile
Used worldwide · Timeless · Rated G