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diameter - 9 dictionary results

di⋅am⋅e⋅ter

[dahy-am-i-ter]
–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 meter 1
di·am·e·ter   (dī-ām'ĭ-tər)   
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.

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.
Language Translation for : diameter
Spanish: diámetro,
German: der Durchmesser,
Japanese: 直径

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.


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)).

Main Entry: di·am·e·ter
Pronunciation: dI-'am-&t-&r
Function: noun
1 : a unit of magnification for an optical instrumentequal to the number of times the linear dimensions of an object are apparently increased diameters>
2 : one of the maximal breadthsof a part of the body diameter of the inlet of the pelvis>

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.

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.

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

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