DILATATION

Pronunciation (US): (GB):

I. (noun)

Sense 1

Meaning:

The act of expanding an aperture

Example:

the dilation of the pupil of the eye

Synonyms:

dilatation; dilation

Classified under:

Nouns denoting acts or actions

Hypernyms ("dilatation" is a kind of...):

enlargement; expansion (the act of increasing (something) in size or volume or quantity or scope)

Hyponyms (each of the following is a kind of "dilatation"):

vasodilation (dilation of blood vessels (especially the arteries))

mydriasis (reflex pupillary dilation as a muscle pulls the iris outward; occurs in response to a decrease in light or certain drugs)

Derivation:

dilate (become wider)

Sense 2

Meaning:

The state of being stretched beyond normal dimensions

Synonyms:

dilatation; distension; distention

Classified under:

Nouns denoting stable states of affairs

Hypernyms ("dilatation" is a kind of...):

physical condition; physiological condition; physiological state (the condition or state of the body or bodily functions)

Hyponyms (each of the following is a kind of "dilatation"):

tympanites (distension of the abdomen that is caused by the accumulation of gas in the intestines or the peritoneal cavity)

ectasia; ectasis (dilatation or distension of a hollow organ)

varicocele (dilatation of the veins associated with the spermatic cord in the testes)

Derivation:

dilate (become wider)

Credits

Context examples:

Viral myocarditis may progress to an autoimmune phase and then to progressive cardiac dilatation.

(Dilated Cardiomyopathy Pathway, NCI Thesaurus/KEGG)

Forasartan selectively competes with angiotensin II for the binding of the angiotensin II (AT1) receptor subtype 1 in vascular smooth muscle, thereby blocking angiotensin II-mediated vasoconstriction resulting in vascular dilatation.

(Forasartan, NCI Thesaurus)

A cystic dilatation that occurs in any part of the biliary tree.

(Biliary Cyst, NCI Thesaurus)

A rare congenital disorder characterized by cystic dilatation of the intrahepatic bile ducts.

(Caroli Disease, NCI Thesaurus)

Cystic dilatation of the hepatic duct or bile duct.

(Choledochal Cyst, NCI Thesaurus)

A clinical diagnosis presenting with painless cervical dilatation and spontaneous mid-trimester birth in recurrent pregnancies in the absence of spontaneous membrane rupture, bleeding or clinical chorioamnionitis.

(Cervical Insufficiency, NCI Thesaurus)

A sac formation resulting from the localized dilatation of the wall of the aorta.

(Aortic Aneurysm, NCI Thesaurus)

A congenital cystic dilatation of the common bile duct; this condition may be asymptomatic, or cause vomiting, fever, jaundice, or pain in the right upper quadrant.

(Choledochal Cyst, NLM, Medical Subject Headings)

Dilatation of the ureter caused by obstruction of urine flow that is present at birth.

(Congenital Hydroureter, NCI Thesaurus)

The period during the first stage of labor and childbirth involved with cervical dilatation, effacement, and fetal station.