n. A change in the apparent position of an object relative to more distant objects, caused by a change in the observer's line of sight toward the object. [French parallaxe, from Greek parallaxis, from parallassein, to change : para-, among; see PARA–1 + allassein, to exchange (from allos, other; see al-1 in the Appendix of Indo-European roots).] par′al·lactic (-lăktĭk) adj. |
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