What does parallax mean?

Definitions for parallax
ˈpær əˌlækspar·al·lax

Here are all the possible meanings and translations of the word parallax.

Princeton's WordNet

  1. parallax(noun)

    the apparent displacement of an object as seen from two different points that are not on a line with the object


  1. Parallax(n.)

    (Astron.) The annual parallax. See annual parallax, below.

  2. Origin: [Gr. alternation, the mutual inclination of two lines forming an angle, fr. to change a little, go aside, deviate; para` beside, beyond + to change: cf. F. parallaxe. Cf. Parallel.]


  1. parallax(Noun)

    The change of angular position of two stationary points relative to each other as seen by an observer, due to the motion of an observer

  2. parallax(Noun)

    The apparent shift of an object against a background due to a change in observer position

  3. parallax(Noun)

    The angle of seeing of the Astronomical Unit

Webster Dictionary

  1. Parallax(noun)

    the apparent displacement, or difference of position, of an object, as seen from two different stations, or points of view

  2. Parallax(noun)

    the apparent difference in position of a body (as the sun, or a star) as seen from some point on the earth's surface, and as seen from some other conventional point, as the earth's center or the sun

  3. Origin: [Gr. alternation, the mutual inclination of two lines forming an angle, fr. to change a little, go aside, deviate; para` beside, beyond + to change: cf. F. parallaxe. Cf. Parallel.]


  1. Parallax

    Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight, and is measured by the angle or semi-angle of inclination between those two lines. The term is derived from the Greek παράλλαξις, meaning "alteration". Nearby objects have a larger parallax than more distant objects when observed from different positions, so parallax can be used to determine distances. Astronomers use the principle of parallax to measure distances to celestial objects including to the Moon, the Sun, and to stars beyond the Solar System. For example, the Hipparcos satellite took measurements for over 100,000 nearby stars. This provides a basis for other distance measurements in astronomy, the cosmic distance ladder. Here, the term "parallax" is the angle or semi-angle of inclination between two sight-lines to the star. Parallax also affects optical instruments such as rifle scopes, binoculars, microscopes, and twin-lens reflex cameras that view objects from slightly different angles. Many animals, including humans, have two eyes with overlapping visual fields that use parallax to gain depth perception; this process is known as stereopsis. In computer vision the effect is used for computer stereo vision, and there is a device called a parallax rangefinder that uses it to find range, and in some variations also altitude to a target.

Chambers 20th Century Dictionary

  1. Parallax

    par′a-laks, n. an apparent change in the position of an object caused by change of position in the observer: (astron.) the difference between the apparent and real place of a star or other celestial object.—adjs. Parallac′tic, -al. [Gr. parallaxispara, beside, allassein, to change—allos, another.]

The Nuttall Encyclopedia

  1. Parallax

    an astronomical term to denote an apparent change in the position of a heavenly body due to a change in the position or assumed position of the observer.

The Standard Electrical Dictionary

  1. Parallax

    The apparent change in position of an object when looked at from two points of view. By looking at an object a few feet distant first with one eye and then with the other, the shifting in apparent position is seen. In reading the position of an indicator or needle over a scale parallax introduces an error unless the eye is held vertically over the needle. By making the dial of looking- glass and holding the eye so that the reflection of its pupil is bisected by the needle this verticality is ensured.

Dictionary of Nautical Terms

  1. parallax

    An apparent change in the position of an object, arising from a change of the observer's station, and which diminishes with the altitude of an object in the vertical circle. Its effect is greatest in the horizon, where it is termed the horizontal parallax, and vanishes entirely in the zenith. The positions of the planets and comets, as viewed from the surface of the earth, differ from those they would occupy if observed from its centre by the amount of parallax, the due application of which is an important element. The stars are so distant that their positions are the same from whatever part of the earth they are seen; but attempts have been made to detect the amount of variation in their places, when observed from opposite points of the earth's orbit, the minute result of which is termed the annual parallax; and the former effect, due to the observer's station on our globe, is called the diurnal parallax.

How to pronounce parallax?

  1. Alex
    US English

How to say parallax in sign language?

  1. parallax


  1. Chaldean Numerology

    The numerical value of parallax in Chaldean Numerology is: 6

  2. Pythagorean Numerology

    The numerical value of parallax in Pythagorean Numerology is: 4

Images & Illustrations of parallax

  1. parallaxparallaxparallaxparallaxparallax

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"parallax." Definitions.net. STANDS4 LLC, 2019. Web. 15 Sep. 2019. <https://www.definitions.net/definition/parallax>.

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