In geometry, a diameter of a circle is any straight line segment that passes through the centre of the circle and whose endpoints lie on the circle. It...

Diameter is an authentication, authorization, and accounting (AAA) protocol for computer networks. It evolved from the earlier RADIUS protocol. It belongs...

The angular diameter, angular size, apparent diameter, or apparent size is an angular distance describing how large a sphere or circle appears from a...

also refer to: Diameter (graph theory), the longest distance between 2 points on a graph Diameter (protocol), a computer protocol Diameter (group theory)...

The Feret diameter or Feret's diameter is a measure of an object's size along a specified direction. In general, it can be defined as the distance between...

Kaluzhsko-Nizhegorodsky Diameter (Russian: Калужско-Нижегородский диаметр) (previously known as Kiyevsko-Gorkovsky Diameter (Russian: Киевско-Горьковский...

The hydraulic diameter, DH, is a commonly used term when handling flow in non-circular tubes and channels. Using this term, one can calculate many things...

Kinetic diameter is a measure applied to atoms and molecules that expresses the likelihood that a molecule in a gas will collide with another molecule...

(Russian: МЦД-2) or Kursko-Rizhsky Diameter (Russian: Курско–Рижский диаметр) is the second of the Moscow Central Diameters, a suburban network in Moscow which...

or Leningradsko-Kazansky Diameter (Russian: Ленинградско-Казанский диаметр) is the third line of the Moscow Central Diameters which was opened on 17 August...

The GBU-39/B Small Diameter Bomb (SDB) is a 250-pound (110 kg) precision-guided glide bomb that is intended to allow aircraft to carry a greater number...

the observable universe. Most galaxies are 1,000 to 100,000 parsecs in diameter (approximately 3,000 to 300,000 light years) and are separated by distances...

A diameter tape (D-tape) is a measuring tape used to estimate the diameter of a cylinder object, typically the stem of a tree or pipe. A diameter tape...

or Belorussko-Savyolovsky Diameter (Russian: Белорусско–Савёловский диаметр) is the first of the Moscow Central Diameters, a suburban network in Moscow...

The beam diameter or beam width of an electromagnetic beam is the diameter along any specified line that is perpendicular to the beam axis and intersects...

geometry, two diameters of a conic section are said to be conjugate if each chord parallel to one diameter is bisected by the other diameter. For example...

In fluid dynamics, Sauter mean diameter (SMD) is an average measure of particle size. It was originally developed by German scientist Josef Sauter in the...

The Martin diameter is the length of the area bisector of an irregular object in a specified direction of measurement. It is used to measure particle size...

follows: The diameters or conjugates of the pelvis are measured at the pelvic inlet and outlet and as oblique diameters. Two diameters may be measured...

equivalent diameter to characterize the properties of various shapes of solid particles, some very irregular. The equivalent diameter is the diameter of a spherical...

In fiber optics, the mode field diameter (MFD) is a measure of the width of an irradiance distribution, i.e., the optical power per unit area, across the...

Median aerodynamic diameter (MAD) is one of two parameters influencing the deposition of inhaled particles, the other being the geometric standard deviation...

The Jupiter radius or Jovian radius (RJ or RJup) has a value of 71,492 km (44,423 mi), or 11.2 Earth radii (R🜨) (one Earth radius equals 0.08921 RJ)....

Ground Launched Small Diameter Bomb (GLSDB) is a weapon developed by Boeing and the Saab Group to allow Boeing's GBU-39 Small Diameter Bomb (SDB), originally...

star's angular diameter can be computed. Stars range in size from neutron stars, which vary anywhere from 20 to 40 km (25 mi) in diameter, to supergiants...

The equivalent spherical diameter of an irregularly shaped object is the diameter of a sphere of equivalent geometric, optical, electrical, aerodynamic...

characterized by its diameter or cross-sectional area. In most cases the core's cross-section should be circular, but the diameter is more rigorously defined...

The tactical diameter of a ship is the distance: travelled on sea surface during a turning circle test with maximum rudder angle by the center of gravity...

mathematical constant that is the ratio of a circle's circumference to its diameter, approximately equal to 3.14159. The number π appears in many formulae...

gestation, the fetal age may be estimated using the biparietal diameter (the transverse diameter of the head, across the two parietal bones), the head circumference...