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racy
rad (1)
rad (2)
rad (3)
rad.
RADA
radar
radar astronomy
radar beacon
radar gun
radar screen
radar trap
radarscope
Radcliff
raddle (1)
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raddled
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radial velocity
ra·di·al ve·loc·i·ty


noun 
Definition:
 
celestial body's velocity: the velocity of a star or other astronomical object measured along the observer's line of sight
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