diameter

Noun
  1. The length of a straight line passing through the center of a circle and connecting two points on the circumference (synset 105109077)
    is a type of: length - the linear extent in space from one end to the other; the longest dimension of something that is fixed in place
    subtypes:
    • bore, caliber, calibre, gauge - diameter of a tube or gun barrel
    • windage - the space between the projectile of a smoothbore gun and the surface of the bore of the gun
    has: r, radius - the length of a line segment between the center and circumference of a circle or sphere
    same as: 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) (synset 113894356)
    is a type of: straight line - a line traced by a point traveling in a constant direction; a line of zero curvature

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