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9 dictionary results for: diameter
Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This
di·am·e·ter       [dahy-am-i-ter] Pronunciation Key
–noun
1.Geometry.
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.
[Origin: 1350–1400; ME diametre < OF < L diametros < Gk diámetros diagonal, diameter, equiv. to dia- dia- + -metros, deriv. of métron meter1]
Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.
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American Heritage Dictionary - Cite This Source - Share This
di·am·e·ter       (dī-ām'ĭ-tər)  Pronunciation Key 
n.  
  1. Abbr. d or diam. Mathematics
    1. A straight line segment passing through the center of a figure, especially of a circle or sphere, and terminating at the periphery.
    2. The length of such a segment.
  2. Thickness or width.
  3. A unit for measuring the magnifying power of a microscope lens or telescope, equal to the number of times an object's linear dimensions are apparently increased.


[Middle English diametre, from Old French, from Latin diametrus, from Greek diametros (grammē), diagonal (line) : dia-, dia- + metron, measure; see mē-2 in Indo-European roots.]

di·am'e·tral (-trəl) adj.
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The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Online Etymology Dictionary - Cite This Source - Share This
diameter 
1387, from O.Fr. diametre, from L. diametrus, from Gk. diametros "diagonal of a circle," from dia- "across, through" + metron "a measure" (see meter (2)).

Online Etymology Dictionary, © 2001 Douglas Harper
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WordNet - Cite This Source - Share This
diameter

noun
1. the length of a straight line passing through the center of a circle and connecting two points on the circumference 
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) 

WordNet® 3.0, © 2006 by Princeton University.
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The American Heritage Science Dictionary - Cite This Source - Share This
diameter       (dī-ām'ĭ-tər)  Pronunciation Key 
  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.

The American Heritage® Science Dictionary
Copyright © 2002 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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American Heritage New Dictionary of Cultural Literacy, Third Edition - Cite This Source - Share This
diameter [(deye-am-uh-tuhr)]

A straight line passing through the center of a figure, especially a circle or sphere, and joining two opposite points on its circumference.


The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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American Heritage Stedman's Medical Dictionary - Cite This Source - Share This

diameter di·am·e·ter (dī-ām'ĭ-tər)
n.

  1. A straight line connecting two opposite points on the surface of a spherical or cylindrical 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.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Free On-line Dictionary of Computing - Cite This Source - Share This

diameter
The diameter of a graph is the maximum value of the minimum distance between any two nodes.

The Free On-line Dictionary of Computing, © 1993-2007 Denis Howe
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Webster's Revised Unabridged Dictionary - Cite This Source - Share This

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.

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.

Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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