# dilation

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**Dilation and evacuation**— (D E) Background Abortion type Surgical First use 1970s Gestation 13 24 weeks Usage UK: Eng. Wales 5% (2005) …22

**Dilation theorem**— may refer to: Sz. Nagy s dilation theorem Stinespring dilation theorem Naimark s dilation theorem This disambiguation page lists articles associated with the same title. If an …23

**dilation and curettage**— Dilation of the cervix and curettement of the endometrium. * * * dilation and curettage n a medical procedure in which the uterine cervix is dilated and a curette is inserted into the uterus to scrape away the endometrium (as for the diagnosis or …24

**dilation and evacuation**— Dilation of the cervix and removal of the products of conception. * * * dilation and evacuation n a surgical abortion that is typically performed midway during the second trimester of pregnancy and in which the uterine cervix is dilated and fetal …25

**dilation and extraction**— n a surgical abortion that is typically performed during the third trimester or later part of the second trimester of pregnancy and in which the uterine cervix is dilated and death of the fetus is induced after it has passed partway through the… …26

**Dilation (operator theory)**— In operator theory, a dilation of an operator T on a Hilbert space H is an operator on a larger Hilbert space K , whose restriction to H is T. More formally, let T be a bounded operator on some Hilbert space H, and H be a subspace of a larger… …27

**Dilation (mathematics)**— In mathematics, a dilation is a function fnof; from a metric space into itself that satisfies the identity:d(f(x),f(y))=rd(x,y) ,for all points x , y , where d ( x , y ) is the distance from x to y and r is some positive real number. In Euclidean …28

**Dilation (metric space)**— In mathematics, a dilation is a function f from a metric space into itself that satisfies the identity for all points (x,y) where d(x,y) is the distance from x to y and r is some positive real number. In Euclidean space, such a dilation is a… …29

**Dilation, pupil (test)**— This examination enables your eye care professional to see more of your retina, the light sensitive layer of tissue at the back of your eye. Dilating (widening) the pupil permits the retina to be examined for signs of disease. To do this, drops… …30

**dilation**— noun Date: 15th century 1. the act or action of dilating ; the state of being dilated ; expansion, dilatation 2. the action of stretching or enlarging an organ or part of the body …