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n. Mathematics A straight line segment passing through the center of a figure, especially of a circle or sphere, and terminating at the periphery.

n. Mathematics The length of such a segment.

n. Thickness or width.

n. 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.

n. Any straight line between two points on the circumference of a circle that passes through the centre/center of the circle.

n. The length of such a line.

n. The maximum distance between any two points in a metric space

n. The maximum eccentricity over all vertices in a graph.

n.

n. 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.

n. A diametral plane.

n. The length of a straight line through the center of an object from side to side; width; thickness.

n. 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.

n. In geometry, a chord of a circle or a sphere which passes through its center; in general

n. a chord of a conic cutting it at points tangents to which are parallel;

n. a line intersecting a quadric surface at points where the tangent planes are parallel.

n. The length of a diameter; the thickness of a cylindrical or spherical body as measured, in the former case on a diameter of a cross-section made perpendicular to the axis, and in the latter on a line passing through the center: as, a tree two feet in diameter; a ball three inches in diameter.

n. The diameter (see def. 2) of the object observed, taken as a convenient measure of linear magnification used in micros-copy and in telescopic work.

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

n. 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)

"Then, a line of tiny holes, less than one-millionth of a meter in diameter, is punched into the metal, spaced five micrometers apart."

straight line   

ideal diameter    tactical diameter    biparietal diameter    diameter limit    intertuberal diameter    conjugate diameters of a conic    coccygeopubic diameter    conjugate diameter of the pelvis    in diameter    apparent diameter of a heavenly body   

diametrically    diametric    semidiameter   

module   

width    thickness    bore    caliber    module   

parameter   

thickness    width    radius    size    length    dimension    circumference    velocity    inch    height