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diameter    音标拼音: [dɑɪ'æmətɚ]
n. 直径,径

直径,径

diameter
直径

diameter
直径

diameter
n 1: the length of a straight line passing through the center of
a circle and connecting two points on the circumference
[synonym: {diameter}, {diam}]
2: 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)

Diameter \Di*am"e*ter\, n. [F. diam[`e]tre, L. diametros, fr.
Gr. ?; dia` through ? measure. See {Meter}.]
1. (Geom.)
(a) Any right line passing through the center of a figure
or body, as a circle, conic section, sphere, cube,
etc., and terminated by the opposite boundaries; a
straight line which bisects a system of parallel
chords drawn in a curve.
(b) A diametral plane.
[1913 Webster]

2. The length of a straight line through the center of an
object from side to side; width; thickness; as, the
diameter of a tree or rock.
[1913 Webster]

Note: In an elongated object the diameter is usually taken at
right angles to the longer axis.
[1913 Webster]

3. (Arch.) The distance through the lower part of the shaft
of a column, used as a standard measure for all parts of
the order. See {Module}.
[1913 Webster]

{Conjugate diameters}. See under {Conjugate}.
[1913 Webster]

89 Moby Thesaurus words for "diameter":
air line, amplitude, area, axis, beeline, bigness, bisector, body,
bore, boundary, breadth, bulk, caliber, center, chord, core,
coverage, depth, diagonal, diaphragm, dimension, dimensions,
direct line, directrix, divider, edge, equator, expanse, expansion,
extension, extent, gauge, girth, great-circle course, greatness,
halfway mark, heart, height, interior, kernel, largeness, length,
line of demarcation, magnitude, mass, mean, measure, measurement,
median, middle, midmost, midriff, midst, normal, nucleus,
partition, perpendicular, proportion, proportions, radius,
radius vector, range, reach, right line, scale, scope, secant,
segment, semidiameter, shortcut, side, size, spread, straight,
straight course, straight line, straight stretch, straightaway,
streamline, tangent, thick, thick of things, transversal, vector,
volume, waist, waistline, width, zone


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