Definitions for diameter
daɪˈæm ɪ tərdi·am·e·ter

Princeton's WordNetRate this definition:1.8 / 5 votes

1. diameter, diamnoun

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

2. diameternoun

   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)

WiktionaryRate this definition:2.0 / 1 vote

1. diameternoun

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

2. diameternoun

   The length of such a line.

3. diameternoun

   The maximum distance between any two points in a metric space

4. diameternoun

   The maximum eccentricity over all vertices in a graph.

Samuel Johnson's DictionaryRate this definition:0.0 / 0 votes

1. DIAMETERnoun

   The line, which passing through the center of a circle, or other curvilinear figure, divides it into equal parts.

   Etymology: διὰ and μέτϱον.

   The space between the earth and the moon, according to Ptolemy and Alfraganus, is seventeen times the diameter of the earth, which makes, in a gross account, about one hundred and twenty thousand miles. Walter Raleigh, History of the World.

   The bay of Naples is the most delightful one that I ever saw: it lies in almost a round figure of about thirty miles in the diameter. Joseph Addison, Remarks on Italy.

ChatGPTRate this definition:0.0 / 0 votes

1. diameter

   Diameter refers to a straight line passing from one side of a circle (or sphere) to another through its center. More generally, in geometry, it can refer to the maximum distance between any two points within a given shape or object.

Webster DictionaryRate this definition:3.5 / 2 votes

1. Diameternoun

   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

2. Diameternoun

   a diametral plane

3. Diameternoun

   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

4. Diameternoun

   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

5. Etymology: [F. diamtre, L. diametros, fr. Gr. ; dia` through + measure. See Meter.]

WikidataRate this definition:5.0 / 2 votes

1. Diameter

   In geometry, the diameter of a circle is any straight line segment that passes through the center of the circle and whose endpoints lie on the circle. It can be also defined as the longest chord of the circle. Both definitions are also valid for the diameter of a sphere. The word "diameter" is derived from Greek διάμετρος, "diameter of a circle", from δια-, "across, through" + μέτρον, "measure". In more modern usage, the length of a diameter is also called the diameter. In this sense one speaks of the diameter rather than a diameter, because all diameters of a circle or sphere have the same length, this being twice the radius. For a convex shape in the plane, the diameter is defined to be the largest distance that can be formed between two opposite parallel lines tangent to its boundary, and the width is defined to be the smallest such distance. Both quantities can be calculated efficiently using rotating calipers. For a curve of constant width such as the Reuleaux triangle, the width and diameter are the same because all such pairs of parallel tangent lines have the same distance. See also Tangent lines to circles.

Chambers 20th Century DictionaryRate this definition:5.0 / 1 vote

1. Diameter

   dī-am′e-tėr, n. the measure through or across: a straight line passing through the centre of a circle or other figure, terminated at both ends by the circumference.—adjs. Diam′etral, Diamet′ric, -al, in the direction of a diameter: pertaining to the diameter: like the opposite ends of the diameter (as in diametrical opposition).—advs. Diam′etrally, in a diametral manner; Diamet′rically, exactly.—Tactical diameter, the space covered by a steamer in turning 180° out of her original course. [Through Fr. and L. from Gr. diametros—dia, through, metrein, to measure.]

Dictionary of Nautical TermsRate this definition:0.0 / 0 votes

1. diameter

   In geometry, a right line passing through the centre of any circular figure from one point of its circumference to another.

Military Dictionary and GazetteerRate this definition:0.0 / 0 votes

1. diameter

   In both a military and geometrical sense, implies a right line passing through the centre of a circle, and terminated at each end by the circumference thereof.

Matched Categories

1. • Straight Line

British National Corpus

1. Nouns Frequency

   Rank popularity for the word 'diameter' in Nouns Frequency: #2461

Usage in printed sourcesFrom: 

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Anagrams for diameter »

1. diatreme

How to pronounce diameter?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say diameter in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of diameter in Chaldean Numerology is: 8

2. Pythagorean Numerology

   The numerical value of diameter in Pythagorean Numerology is: 3

Examples of diameter in a Sentence

1. Jim Jobling:

   It fires a shell that is about 3 inches in diameter, it could have been used as case shot, or shrapnel, on ongoing soldiers or sailors in rowboats.

2. Ron Blankstein:

   The penile artery that delivers the blood flow to the penis is a much smaller diameter, and it's the smaller blood vessels which show the first signs of disease, they are unable to dilate and deliver sufficient blood flow.

3. Lance Lenoir:

   Unfortunately, we are severely lacking in technology, it’s difficult trying to find something in a specific geologic region that is in a confined space that can be 4 feet in diameter and 90 feet underground.

4. Sam Deen:

   Based on the given absolute magnitude, and given how exceptionally red it looked in 2014 precovery images from CFHT (the g - r color was 0.9, and r - i was 0.5!) I would estimate at an albedo of 0.01-0.08 a diameter of 130-370 kilometers (nominally 160) which puts it on a similar scale, if not larger than, Sarabat's huge comet C/1729 P1, and almost undoubtedly the largest Oort Cloud object ever discovered- almost in dwarf planet territory! i have little doubt in my mind that as this gets closer to the sun, it will begin displaying the coma and tail typical of every other object yet seen in its orbit.

5. Raquel Corniuk:

   We look at how it’s twisted. Is it twisted versus braided? We are trying to look at how many strands does it have, its twine diameter, mesh stretch size.

Popularity rank by frequency of use

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=diameter
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Diameter
3. ^ Samuel Johnson's Dictionary
   https://johnsonsdictionaryonline.com/views/search.php?term=diameter
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Webster Dictionary
   https://www.merriam-webster.com/dictionary/diameter
6. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=diameter
7. ^ Chambers 20th Century Dictionary
   https://www.gutenberg.org/files/37683/37683-h/37683-h.htm#:~:text=diameter
8. ^ Dictionary of Nautical Terms
   https://www.gutenberg.org/cache/epub/26000/pg26000-images.html#:~:text=diameter
9. ^ Military Dictionary and Gazetteer
   https://www.gutenberg.org/cache/epub/59563/pg59563-images.html
10. ^ Usage in printed sources
    https://books.google.com/ngrams/graph?content=diameter