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Definition of Diameter
1. Noun. The length of a straight line passing through the center of a circle and connecting two points on the circumference.
Terms within: R, Radius
Specialized synonyms: Bore, Caliber, Calibre, Gauge, Windage
Generic synonyms: Length
Derivative terms: Diametral, Diametric, Diametrical
2. Noun. 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).
Definition of Diameter
1. 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.
Definition of Diameter
1. Noun. (geometry) Any straight line between two points on the circumference of a circle that passes through the centre/center of the circle. ¹
2. Noun. (geometry) The length of such a line. ¹
3. Noun. (geometry) The maximum distance between any two points in a metric space ¹
4. Noun. (graph theory) The maximum eccentricity over all vertices in a graph. ¹
¹ Source: wiktionary.com
Definition of Diameter
1. a straight line passing through the center of a circle and ending at the periphery [n -S]
Medical Definition of Diameter
1. The length of a straight line passing through the centre of a circle and connecting opposite points on its circumference, hence the distance between two specified opposite points on the periphery of a structure such as the cranium or pelvis. This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)
Lexicographical Neighbors of Diameter
Literary usage of Diameter
Below you will find example usage of this term as found in modern and/or classical literature:
1. A History of Greek Mathematics by Thomas Little Heath (1921)
"the tangent at any point of a central conic, in relation to the original diameter
of reference; if Q is the point of contact, QV the ordinate to the ..."
2. Encyclopaedia Britannica: A Standard Work of Reference in Art, Literature (1907)
"For the line which joins tho ends of a diameter to any point on the carve include
... 23) be one pair of conjugate diameter« at right angles to each other, ..."
3. Proceedings of the American Philosophical Society Held at Philadelphia for by American Philosophical Society (1921)
"... 218 Lower molar length 124 diameter, pj, anteroposterior 39 diameter, p4, ...
transverse anteriorly 42.5 47 diameter, mj, anteroposterior 36 diameter, ..."
4. Science by American Association for the Advancement of Science (1897)
"A cylindrical block of 82 mm. diameter and of 55 g. weight was compared with a
series of blocks of 35 mm. diameter but of various weights. ..."
5. Transactions of the American Society of Mechanical Engineers by American Society of Mechanical Engineers (1891)
"8” diameter exhaust outlet 10” 83-INCH CYLINDER. ... 7” Thickness of steam space
in jacket 1” diameter of piston rods 2+1” diameter steam inlet 10” diameter ..."
6. Transactions by American Ethnological Society (1855)
"The rolls are on the second motion, the diameter of the driving wheel being 2J
feet diameter, and that on the rope wheel shaft 4J feet diameter. ..."
7. A History of Greek Mathematics by Thomas Little Heath (1921)
"the tangent at any point of a central conic, in relation to the original diameter
of reference; if Q is the point of contact, QV the ordinate to the ..."
8. Encyclopaedia Britannica: A Standard Work of Reference in Art, Literature (1907)
"For the line which joins tho ends of a diameter to any point on the carve include
... 23) be one pair of conjugate diameter« at right angles to each other, ..."
9. Proceedings of the American Philosophical Society Held at Philadelphia for by American Philosophical Society (1921)
"... 218 Lower molar length 124 diameter, pj, anteroposterior 39 diameter, p4, ...
transverse anteriorly 42.5 47 diameter, mj, anteroposterior 36 diameter, ..."
10. Science by American Association for the Advancement of Science (1897)
"A cylindrical block of 82 mm. diameter and of 55 g. weight was compared with a
series of blocks of 35 mm. diameter but of various weights. ..."
11. Transactions of the American Society of Mechanical Engineers by American Society of Mechanical Engineers (1891)
"8” diameter exhaust outlet 10” 83-INCH CYLINDER. ... 7” Thickness of steam space
in jacket 1” diameter of piston rods 2+1” diameter steam inlet 10” diameter ..."
12. Transactions by American Ethnological Society (1855)
"The rolls are on the second motion, the diameter of the driving wheel being 2J
feet diameter, and that on the rope wheel shaft 4J feet diameter. ..."
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