diameter

Definition of Diameter in English :

1. diam, diameter

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

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)

WordNet Lexical Database for English. Princeton University. 2010.

Diameter

noun

1.

a.

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

2.

the thickness of something, esp with circular cross section

noun

1.

a line segment passing through the center of a circle, sphere, etc. from one side to the other

2.

the length of such a segment; width or thickness of a circular, or somewhat circular, figure or object

3. Optics

the unit of measure of the magnifying power of a lens

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.