Origin of parallax
Examples from the Web for parallactic
There is, however, a still graver and quite insuperable distinction between the parallactic path and the aberrational path.
If a penny-piece were placed on this sphere, in front of each of the stars, every parallactic ellipse would be totally concealed.
How shall we adequately describe the extreme minuteness of the parallactic ellipses in the case of even the nearest stars?
If we ascertain the parallactic motion of a group of stars, then we can find their average distance.Astronomy|David Todd
The most obvious and direct method is to determine the parallactic motion of the stars of known parallax.
British Dictionary definitions for parallactic
Word Origin for parallax
Word Origin and History for parallactic
1570s, from Middle French parallaxe (mid-16c.), from Greek parallaxis "change, alteration, inclination of two lines meeting at an angle," from parallassein "to alter, make things alternate," from para- (see para- (1)) + allassein "to change," from allos "other" (see alias). Related: Parallactic.