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DILATION
| Pronunciation (US): |  | (GB): | |
I. (noun)
Sense 1
Meaning:
The act of expanding an aperture
Example:
the dilation of the pupil of the eye
Synonyms:
Classified under:
Nouns denoting acts or actions
Hypernyms ("dilation" 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 "dilation"):
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:
A lengthy discussion (spoken or written) on a particular topic
Classified under:
Nouns denoting communicative processes and contents
Hypernyms ("dilation" is a kind of...):
discourse; discussion; treatment (an extended communication (often interactive) dealing with some particular topic)
Derivation:
dilate (add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing)
Context examples:
Furthermore, decreased myocardial contractility and dilation of the main coronary and systemic arteries lead to increased blood flow and oxygen delivery to the myocardial tissue and decreases total peripheral resistance.
(Amlodipine Maleate, NCI Thesaurus)
Segmental, irreversible dilation of the bronchial tree resulting in the accumulation of secretions which leads to obstruction.
(Bronchiectasis, NCI Thesaurus)
The terminal dilation of an alveolar duct that gives rise to alveoli in the lung.
(Alveolar Sac, NCI Thesaurus)
A rounded dilation or expansion in a canal, vessel, or organ.
(Bulb, NCI Thesaurus)
A dilation of the duodenal papilla that is the opening of the juncture of the common bile duct and the main pancreatic duct.
(ampulla of Vater, NLM, Medical Subject Headings)
Dilation of the valve between the left ventricle of the heart and the aorta by inflating a balloon.
(Aortic Balloon Valvotomy, NCI Thesaurus/ACC)
Local alpha stimulatory effects include dilation of the pupil, increased flow of aqueous humor, and vasoconstriction; whereas beta stimulatory effects include relaxation of the ciliary muscle and a decreased production in aqueous humor.
(Hydroxyamphetamine, NCI Thesaurus)
Dilation of the valve between the left atrium and the left ventricle of the heart by inflating a balloon.
(Mitral Balloon Valvotomy, NCI Thesaurus/ACC)
Alpha-adrenergic Agonists can initiate physiological responses such as vasoconstriction, pupil dilation, and contraction of pilomotor muscles.
(Alpha-Adrenergic Agonist, NCI Thesaurus)
The last documented cervical dilation, in centimeters, when the provider orders admission.
(Number of Centimeters Dilated on Admission, NCI Thesaurus)
