# dilation

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**dilation and curettage**— noun a surgical procedure usually performed under local anesthesia in which the cervix is dilated and the endometrial lining of the uterus is scraped with a curet; performed to obtain tissue samples or to stop prolonged bleeding or to remove… …52

**Time dilation**— This article is about a concept in physics. For the concept in sociology, see time displacement. In the theory of relativity, time dilation is an observed difference of elapsed time between two events as measured by observers either moving… …53

**Intact dilation and extraction**— (IDX, intact D X, et al.) Background Abortion type Surgical First use 1983 Gestation >16 weeks Usage United States 0.17% ( …54

**Gravitational time dilation**— is the effect of time passing at different rates in regions of different gravitational potential; the higher the local distortion of spacetime due to gravity, the slower time passes. Albert Einstein originally predicted this effect in his theory… …55

**Cervical dilation**— (cervical dilatation) is the opening of the cervix, the entrance to the uterus, during childbirth, miscarriage, induced abortion, or gynecological surgery. Cervical dilation may occur naturally, or may be induced by medical means. Contents 1… …56

**Sz.-Nagy's dilation theorem**— The Sz. Nagy dilation theorem (proved by Béla Szőkefalvi Nagy) states that every contraction T on a Hilbert space H has a unitary dilation U to a Hilbert space K , containing H , with:T^n = P H U^n vert HMoreover, such a dilation is unique (up to …57

**time dilation**— In the theory of special relativity, the slowing down of a clock as perceived by an observer in relative motion with respect to that clock. Time dilation becomes noticeable only at speeds approaching that of light and has been accurately… …58

**Naimark's dilation theorem**— In operator theory, Naimark s dilation theorem is a result that characterizes positive operator valued measures. It can be viewed as a consequence of Stinespring s dilation theorem. Contents 1 Note 2 Some preliminary notions 3 Naimark s theorem …59

**time dilation**— noun also time dilatation : a slowing of time in accordance with the theory of relativity that occurs in a system in motion relative to an outside observer and that becomes apparent especially as the speed of the system approaches that of light * …60

**time dilation**— noun Date: 1934 a slowing of time in accordance with the theory of relativity that occurs in a system in motion relative to an outside observer and that becomes apparent especially as the speed of the system approaches that of light called also… …