# Definitions for diameterdaɪˈæm 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.]

### FreebaseRate 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. diametrosdia, 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.

### British National Corpus

1. Nouns Frequency

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

1. diatreme

### 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. 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.

2. There is an eight-foot buoy floating at the point of the intake piping, which has been in place since the plant opened, and states that people should stay 100 feet away. There are three intake pipes, which extend for a quarter mile along the floor of the ocean, and the one that the diver swam into is 16 feet in diameter with a protective cap.

3. As I got closer, the flames were just bigger and bigger, it was shooting up to 200 feet or more, and a fireball maybe 10 to 15 feet in diameter. It was like out of a movie.

4. Organoids are small pieces of a patients' tumor that are about 100 to 300 microns in diameter and they grow as kind of sphere like shapes.

5. 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.

### Popularity rank by frequency of use

diameter#1#5388#10000

## Translations for diameter

### From our Multilingual Translation Dictionary

• قطر
• ব্যাস
• diàmetre
• průměr
• diamedr
• diameter
• Durchmesser
• διάμετρος
• diámetro
• قطر
• läpimitta, halkaisija
• diamètre
• trastomhas, lárlíne
• קוטר
• व्यास
• dyamèt
• átmérő
• տրամագիծ
• diametro
• 直径
• ವ್ಯಾಸ
• 직경
• line
• пречник, дијаметар
• diameter, garis pusat
• diameter
• doorsnede, middellijn, diameter
• diameter
• średnica
• diâmetro
• diametru
• диаметр, поперечник
• prečnik
• diameter
• kipenyo
• đường kính

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