In medicine, another name for an intrauterine device. IUD
(iud) Or coil, a contraceptive device that is inserted into the womb (uterus). It is a tiny plastic object, sometimes containing copper. By causing a mild inflammation of the lining of the uterus it prevents fertilized eggs from becoming implanted.
IUDs are not usually given to women who have not had children. They are generally very reliable, as long as they stay in place, with a success rate of about 98%. Some women experience heavier and more painful periods, and there is a very slight risk of a pelvic infection leading to infertility. intra-uterine device
An intrauterine contraceptive device in the shape of a loop.
Eine ebene Kurve, die sich mit wachsendem Abstand um einen Punkt herumwindet.
ETYM Of Celtic origin; cf. Gael. goil fume, rage.
1. A round shape formed by a series of concentric circles; SYN. whorl, roll, curl, curlicue, ringlet, gyre, scroll.
2. Something wound in a continuous series of loops; SYN. spiral, volute, whorl, helix.
3. Tubing that is wound in a spiral.
4. A transformer that supplies high voltage to spark plugs in a gasoline engine.
5. A spiral of insulated wire that introduces inductance into a circuit.
6. A contraceptive device placed inside a woman's womb.
ETYM Latin helix, Greek, to turn round; cf. Latin volvere, and Eng. volute, voluble.
A curve that lies on the surface of a cylinder or cone and cuts the element at a constant angle; SYN. spiral.
Any spiral-formed object; rim of outer ear; snail-shell; screw-thread.
In mathematics, a three-dimensional curve resembling a spring, corkscrew, or screw thread. It is generated by a line that encircles a cylinder or cone at a constant angle.
1. Anything with a round or oval shape that is closed or nearly closed; SYN. circuit.
2. An inner circle of advisors (especially under President Reagan).
3. The basic pattern of the human fingerprint.
ETYM Cf. French spirale. Related to Spiral.
1. A curve on a plane that winds around a center with an increasing distance from the center; SYN. volute.
2. A plane curve traced by a point circling about the center but at ever-greater distances from it.
3. Flying downward in a helical path with a large radius.
A plane curve formed by a point winding round a fixed point from which it distances itself at regular intervals, for example the spiral traced by a flat coil of rope. Various kinds of spirals can be generated mathematically—for example, an equiangular or logarithmic spiral (in which a tangent at any point on the curve always makes the same angle with it) and an involute. Spirals also occur in nature as a normal consequence of accelerating growth, such as the spiral shape of the shells of snails and some other mollusks.