The process of enlargement or expansion. The word "dilatation" means the same thing. Both come from the Latin "dilatare" meaning "to enlarge or expand."
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1. Physiologic or artificial enlargement of a hollow structure or opening. 2. The act of stretching or enlarging an opening or the lumen of a hollow structure. SYN: dilatation. [L. dilato, pp. dilatatus, to spread out, dilate]
- d. and extraction a form of abortion in which the cervix is dilated and the fetus extracted in pieces using surgical forceps; technique used to complete a second trimester spontaneous abortion or as a form of induced abortion.
- post- stenotic d. d. of an artery, most commonly the pulmonary artery or the aorta, distal to an area of narrowing.
- d. and suction SYN: suction curettage.
- urethral d. increasing the caliber of the urethra by passage of a dilator.

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di·la·tion dī-'lā-shən n
1) the state of being dilated: DILATATION
2) the action of stretching or enlarging an organ or part of the body <cervical \dilation> <\dilation of the pupil with atropine>

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di·la·tion (di-laґshən) 1. the act of dilating or stretching; it may be either a normal physiological process done by muscles or a therapeutic process done by dilators. 2. dilatation (def. 1).

Medical dictionary. 2011.

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  • Dilation — (or dilatation) refers to an enlargement or expansion in bulk or extent, the opposite of contraction. It derives from the Latin dilatare, to spread wide . In physiology: Pupillary dilation, dilation of the pupil of the eye Cervical dilation, the… …   Wikipedia

  • dilation — ● dilation nom féminin (latin dilatio, onis) Phénomène d assimilation phonétique à distance. (Par exemple, en français, chercher est issu par dilation de sercher.) ● dilation (homonymes) nom féminin (latin dilatio, onis) dilations forme conjuguée …   Encyclopédie Universelle

  • Dilation — Di*la tion, n. [From dilate, v., cf. {Dilatation}, {Dilator}.] The act of dilating, or the state of being dilated; expansion; dilatation. Mrs. Browning. [1913 Webster] At first her eye with slow dilation rolled. Tennyson. [1913 Webster] A… …   The Collaborative International Dictionary of English

  • Dilation — Di*la tion, n. [L. dilatio. See {Dilatory}.] Delay. [Obs.] Bp. Hall. [1913 Webster] …   The Collaborative International Dictionary of English

  • Dilatĭon — (v. lat., Rechtsw.), Aufschub, die Verlängerung einer, zu einem rechtlichen Acte gewährten Frist; daher Dilationsgesuche (s.u. Termin) u. Dilationsschein, Bescheinigung über die gestattete Fristverlängerung. Dilatorisch, aufschiebend, verzögernd; …   Pierer's Universal-Lexikon

  • Dilation — (lat.), Aufschub, Frist, besonders Vertagung eines Prozesses, vom Richter wegen fehlender Zeugen, Beweise etc. bewilligt …   Meyers Großes Konversations-Lexikon

  • Dilation — (lat.), Aufschub, die zur Vornahme eines rechtlichen Aktes gewährte Frist; dilatōrisch, aufschiebend, verzögernd; dilatorische Einreden, dem Klageanspruch nicht dauernd, sondern nur zeitweise entgegenstehende; dilatorische Frist, s. Frist.… …   Kleines Konversations-Lexikon

  • Dilation — (lat. dilatio), Aufschub, besonders einer gerichtlichen Frist; dilatorisch, aufschiebend; Dilatorium, der durch richterliche Entscheidung gegebene Aufschub …   Herders Conversations-Lexikon

  • dilation — index extension (expansion), inflation (increase) Burton s Legal Thesaurus. William C. Burton. 2006 …   Law dictionary

  • dilation — 1590s, formed from DILATE (Cf. dilate) on the mistaken assumption that the ate in that word was the Latin verbal suffix (it is instead part of the stem); the proper form, DILATATION (Cf. dilatation), is older (c.1400) …   Etymology dictionary

  • dilation — [dī lā′shən, dilā′shən] n. 1. a dilating or being dilated, as of the pupil of an eye, a blood vessel, or the cervix during childbirth: cf. DILATATION 2. a dilated part …   English World dictionary

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