peculiar velocity


Also found in: Dictionary, Thesaurus, Wikipedia.

peculiar velocity

See peculiar motion.

peculiar velocity

[pə′kyül·yər və′läs·əd·ē]
(astronomy)
Superposed on the systematic rotation of the galaxy are individual motions of the stars; each star moves in a somewhat elliptical orbit and therefore shows a velocity of its own (peculiar velocity) to the local standard of rest, the standard moving in a circular orbit around the galactic center.