# Distance

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## distance

1. Geometry
a. the length of the shortest line segment joining two points
b. the length along a straight line or curve
2. Horse racing
a. Brit a point on a racecourse 240 yards from the winning post
b. Brit any interval of more than 20 lengths between any two finishers in a race
c. US the part of a racecourse that a horse must reach in any heat before the winner passes the finishing line in order to qualify for later heats
3. go the distance Boxing to complete a bout without being knocked out
4. the distant parts of a picture, such as a landscape
5. middle distance
a. (in a picture) halfway between the foreground and the horizon
b. (in a natural situation) halfway between the observer and the horizon
6. Athletics relating to or denoting the longer races, usually those longer than a mile

## Distance

distance in depth between servicemen, guns, vehicles, and subunits or units (ships) when formed in ranks, on the march (cruise), or in combat formation and also between aircraft when flying in formation or in a combat formation.

## Distance

an important geometric concept whose meaning depends on the kind of entities for which it is defined. The distance between two points is the length of the line segment joining the points. The distance from a point to a line or a plane is the length of the perpendicular from this point to the line or plane. The distance between two parallel lines or planes is the length of a common perpendicular to the lines or planes. The distance between two nonintersecting nonparallel lines in space is equal to the distance between the parallel planes in which the lines lie—that is, the length of the line segment that joins the lines and is perpendicular to both.

## distance

[′dis·təns]
(mathematics)
A nonnegative number associated with pairs of geometric objects.
The spatial separation of two points, measured by the length of a hypothetical line joining them.
For two parallel lines, two skew lines, or two parallel planes, the length of a line joining the two objects and perpendicular to both.
For a point and a line or plane, the length of the perpendicular from the point to the line or plane.
(mechanics)
The spatial separation of two points, measured by the length of a hypothetical line joining them.
References in periodicals archive ?
During surgical procedures, the working distance requires frequent adjustment for clear visualization of the more distal areas of the anatomy as the operation progresses.
A 30 metre wireless working distance, allows one to move around and enjoy their favorite tunes, while the ambient noise isolation adds to the experience.
A 60mm parfocal distance and a much larger barrel diameter allows these objectives to offer increased brightness and the highest possible combination of working distance and numerical aperture (for light-gathering ability).
Upon increasing the effective magnification using the automated and software-controlled "high magnification mechanism," and importantly, without changing the objective and thus preserving the full 21-mm objective working distance, pixel resolution to 1.
Equipped with through-the-lens sighting and narrowband IR filters, sensor features optimal working distance of 1,200 ft with max distance of 1,800 ft.
The improved working distance of the XYRCOS laser objective provides researchers with more compatibility and flexibility to integrate with existing laboratory equipment.
The average working distance for text messages was 36 centimeters (14.
Its digital zoom offers multiple magnifications, and a wide range of long working distance optical objectives are available.
The working distance is calculated by measuring the distance from the eye to the working area.
The padding conveyor can eject screened material from either side and from desired working distance and folds for convenient transport.

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