1. [syn: 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);
The Collaborative International Dictionary of English v.0.48:
Diameter \Di*am"e*ter\, n. [F. diam[`e]tre, L. diametros, fr.
Gr. ?; dia` through + ? measure. See Meter.]
(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.
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.
Note: In an elongated object the diameter is usually taken at
right angles to the longer axis.
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.
Conjugate diameters. See under Conjugate.
WordNet (r) 3.0 (2006):
n 1: the length of a straight line passing through the center of
a circle and connecting two points on the circumference
[syn: 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)
Moby Thesaurus II by Grady Ward, 1.0:
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
The Free On-line Dictionary of Computing (30 December 2018):
The diameter of a graph is the maximum value of the minimum
distance between any two nodes.