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Definitions for Parallax

[1] the apparent displacement of an observed object due to a change in the position of the observer.
[2] Astronomy . the apparent angular displacement of a celestial body due to its being observed from the surface instead of from the center of the earth (diurnal parallax or geocentric parallax) or due to its being observed from the earth instead of from the sun (annual parallax or heliocentric parallax) . Compare parallactic ellipse.
[3] the difference between the view of an object as seen through the picture-taking lens of a camera and the view as seen through a separate viewfinder.
[4] an apparent change in the position of cross hairs as viewed through a telescope, when the focusing is imperfect.
[5] Digital Technology . a 3D effect observed when images and other elements in the foreground of a screen move at a different rate than those in the background (often used attributively): parallax scrolling; Does this phone have parallax?
[6] an apparent change in the position of an object resulting from a change in position of the observer
[7] astronomy the angle subtended at a celestial body, esp a star, by the radius of the earth's orbit. Annual or heliocentric parallax is the apparent displacement of a nearby star resulting from its observation from the earth. Diurnal or geocentric parallax results from the observation of a planet, the sun, or the moon from the surface of the earth

Words nearby Parallax

paralipomena, paralipomenon, paralipsis, parallactic ellipse, parallactic motion, parallax, parallax test, parallel, parallel bars, parallel circuit, parallel cousin

Origin of Parallax

1585–95; < Greek parállaxis change, equivalent to parallak- (stem of parallássein to cause to alternate, equivalent to para- para-1 + allássein to vary, akin to állos other; see else, allo-) + -sis -sis

Other words from Parallax

par·al·lac·tic [par-uh -lak -tik] /ˌpær əˈlæk tɪk/ , adjective
par·al·lac·ti·cal·ly , adverb
par′al•lac′ tic (-lăk′ tĭk ) adj.

Word origin for Parallax

C17: via French from New Latin parallaxis, from Greek: change, from parallassein to change, from para- 1 + allassein to alter