• Dutch: middellijn
• Finnish: halkaisija
• French: diamètre
• Hebrew: קוטר (qot'er)
• Irish: trastomhas
• Italian: diametro
• Japanese: 直径 (chokkei)
• Spanish: diámetro
• Swedish: diameter

• Chinese: 直徑, 直径
• Czech: průměr
• Dutch: diameter
• Finnish: läpimitta
• French: diamètre
• German: Durchmesser
• Greek: διάμετρος
• Hebrew: קוטר (qot'er)
• Italian: diametro
• Japanese: 直径 (chokkei)
• Korean: 직경
• Portuguese: diâmetro
• Russian: диаметр (diametr)
• Spanish: diámetro
• Swedish: diameter

Related terms

• diametric
• diametrically

See also

• circumference
• radius

Dutch

Noun

1. diameter (length of diametrical chord)

See also

• middellijn

Swedish

Noun

diameter

1. diameter

For the authentication, authorization, and accounting protocol, see Diameter (protocol).

The symbol or variable for diameter is similar in size and design to ø, the lowercase letter o with stroke. Unicode provides character number 8960 (hexadecimal 2300) for the symbol, which can be encoded in HTML webpages as ⌀ or ⌀. Proper display of this character, however, is unlikely in most situations, as most fonts do not have it included. (Your browser displays ⌀ in the current font.) In most situations the letter ø is acceptable, obtained in Microsoft Windows by holding the [Alt] key down while entering 0 2 4 8 on the numeric keypad.

The diameter symbol, ⌀, is distinct from the empty set symbol, ∅, and from an uppercase phi, Ø.

The diameter also refers to the approximate size of the corner of a frame of any given object to the nearest flat surface it represents.

See also

• angular diameter
• hydraulic diameter
• caliper, micrometer, tools for measuring diameters
• Eratosthenes, who calculated the diameter of the Earth around 240 BC.
• Jung's theorem, an inequality relating the diameter to the radius of the smallest enclosing ball

References

External links

• (geometry) Diameter and many other circle properties defined With interactive applets

air line, amplitude, area, axis, beeline, bigness, bisector, body, bore, boundary, breadth, bulk, caliber, center, chord, core, coverage, depth, diagonal, diaphragm, dimension, dimensions, direct line, directrix, divider, edge, equator, expanse, expansion, extension, extent, gauge, girth, great-circle course, greatness, halfway mark, heart, height, interior, kernel, largeness, length, line of demarcation, magnitude, mass, mean, measure, measurement, median, middle, midmost, midriff, midst, normal, nucleus, partition, perpendicular, proportion, proportions, radius, radius vector, range, reach, right line, scale, scope, secant, segment, semidiameter, shortcut, side, size, spread, straight, straight course, straight line, straight stretch, straightaway, streamline, tangent, thick, thick of things, transversal, vector, volume, waist, waistline, width, zone