Parallax
Chamber's Etymological of the English Language · 1895 · p. 371
par'a-laks, n. an apparent change in the position of an object caused by change of position in the observer lastr.) the difference between the appaient and real place of a celestial object, —adjs. Parallactic, Parallao'tioal. [Gr. parallaxts—para, beside, and alla b, to changealios, another Parallel, par'al-lel, atij side by side geom extended in the same direction and equidistant in all parts with the same direction or tendency: running in accordance with resembling in all e ential points like or similar. n. a line always equidistant from another a line marking latitude likene a comparison counterpart 1 in pi the trenches, generally dug parallel with the outline of the fortre .— v.t. to place so as to lie parallel, to correspond lo.—pr.p, paralleling or parallelling p
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