| 释义 |
diameter
 diameterdi·am·e·ter D0196900 (dī-ăm′ĭ-tər)n.1. Abbr. d or diam. Mathematics a. A straight line segment passing through the center of a figure, especially of a circle or sphere, and terminating at the periphery.b. The length of such a segment.2. Thickness or width.3. A unit of magnification equal to the number of times an object's linear dimensions is increased by the magnifying apparatus.
[Middle English diametre, from Old French, from Latin diametrus, from Greek diametros (grammē), diagonal (line) : dia-, dia- + metron, measure; see mē- in Indo-European roots.]
di·am′e·tral (-trəl) adj.diameter (daɪˈæmɪtə) n1. (Mathematics) a. a straight line connecting the centre of a geometric figure, esp a circle or sphere, with two points on the perimeter or surfaceb. the length of such a line2. the thickness of something, esp with circular cross section[C14: from Medieval Latin diametrus, variant of Latin diametros, from Greek: diameter, diagonal, from dia- + metron measure]di•am•e•ter (daɪˈæm ɪ tər)
n. 1. a. a straight line passing through the center of a circle or sphere and meeting the circumference or surface at each end. b. a straight line passing from side to side of any figure or body, through its center. 2. the length of such a line. 3. the width of a circular or cylindrical object. [1350–1400; Middle English diametre < Old French < Latin diametros < Greek diámetros diagonal, diameter =dia- dia- + -metros, derivative of métron meter1] di•am′e•tral, adj. di·am·e·ter (dī-ăm′ĭ-tər)1. A straight line segment that passes through the center of a circle or sphere from one side to the other.2. The length of such a line segment.diameter - From Greek, meaning "measure through" (a circle or sphere, etc.).See also related terms for sphere.Thesaurus| Noun | 1. |  diameter - the length of a straight line passing through the center of a circle and connecting two points on the circumferencediamradius, r - the length of a line segment between the center and circumference of a circle or spherecaliber, calibre, bore, gauge - diameter of a tube or gun barrelwindage - the space between the projectile of a smoothbore gun and the surface of the bore of the gunlength - the linear extent in space from one end to the other; the longest dimension of something that is fixed in place; "the length of the table was 5 feet" | | 2. | diameter - a straight line connecting the center of a circle with two points on its perimeter (or the center of a sphere with two points on its surface)straight line - a line traced by a point traveling in a constant direction; a line of zero curvature; "the shortest distance between two points is a straight line" |
diameternoun breadth, span, width, spread, beam, latitude, broadness, wideness the diameter of a human hairTranslationsdiameter (daiˈӕmitə) noun (the length of) a straight line drawn from side to side of a circle, passing through its centre. Could you measure the diameter of that circle? 直徑 直径diameter
diametera. a straight line connecting the centre of a geometric figure, esp a circle or sphere, with two points on the perimeter or surface b. the length of such a line Diameter The diameter of a circle is the chord that passes through the center of the circle. Moreover, the diameter of a circle is the length of this chord, equal to two radii. In analytic geometry the diameter of a conic section (or of a curve of the second order) is understood to mean the straight line that passes through the midpoints of a set of parallel chords. For central curves of the second order (circles, ellipses, hyperbolas) this is the straight line passing through the center of the curve. In the case of the parabola, all diameters are parallel to its axis. The concept of the diameter of a circle as the length of a segment is applied to other geometric figures and to sets of a more general nature. The diameter of a figure (or a set in metric space) is precisely the upper bound of the distances between all possible pairs of points of this figure. In this sense, the diameter of an ellipse is equal to the length of the semimajor axis, and the diameter of a square is equal to the length of its diagonal. diameter[dī′am·əd·ər] (mathematics) A line segment which passes through the center of a circle, and whose end points lie on the circle. The length of such a line. For a conic, any straight line that passes through the midpoints of all the chords of the conic that are parallel to a given chord. For a set, the smallest number that is greater than or equal to the distance between every pair of points of the set. diameterThe diameter of a graph is the maximum value of the minimumdistance between any two nodes.DiameterAn authentication, authorization and accounting (AAA) protocol that replaces RADIUS (Diameter is a play on the word RADIUS). Like RADIUS, Diameter uses a challenge/response method; however, unlike RADIUS, Diameter uses the reliable TCP and SCTP protocols rather than the unreliable UDP for transport. Diameter also supports error reporting and is better at scaling than RADIUS. See RADIUS, network access server and challenge/response.
See diameterdiameter
diameter [di-am´ĕ-ter] the length of a straight line passing through the center of a circle and connecting opposite points on its circumference; hence the distance between the two specified opposite points on the periphery of a structure such as the cranium or pelvis.cranial d's (craniometric d's) imaginary lines connecting points on opposite surfaces of the cranium; the most important are biparietal, that joining the parietal eminences; bitemporal, that joining the extremities of the coronal suture; cervicobregmatic, that joining the center of the anterior fontanel and the junction of the neck with the floor of the mouth; frontomental, that joining the forehead and chin; occipitofrontal, that joining the external occipital protuberance and the most prominent midpoint of the frontal bone; occipitomental, that joining the external occipital protuberance and the most prominent midpoint of the chin; suboccipitobregmatic, that joining the lowest posterior point of the occiput and the center of the anterior fontanel.pelvic diameter see pelvic diameter.di·am·e·ter (dī-am'ĕ-tĕr), 1. A straight line connecting two opposite points on the surface of a more or less spheric or cylindric body, or at the boundary of an opening or foramen, passing through the center of such body or opening. 2. The distance measured along such a line. [G. diametros, fr. dia, through, + metron, measure] di·am·e·ter (dī-am'ĕ-tĕr) 1. A straight line connecting two opposite points on the surface of a more or less spheric or cylindric body, or at the boundary of an opening or foramen, passing through the center of such body or opening. 2. The distance measured along such a line. [G. diametros, fr. dia, through, + metron, measure]See DIAM
See DIAdiameter
Synonyms for diameternoun breadthSynonyms- breadth
- span
- width
- spread
- beam
- latitude
- broadness
- wideness
Synonyms for diameternoun the length of a straight line passing through the center of a circle and connecting two points on the circumferenceSynonymsRelated Words- radius
- r
- caliber
- calibre
- bore
- gauge
- windage
- length
noun a straight line connecting the center of a circle with two points on its perimeter (or the center of a sphere with two points on its surface)Related Words |