Common name for Sirius (Alpha Canis Majoris) (3,4)
I believe the answer is:
dog star
(Other definitions for dog star that I've seen before include "Part of 8 [CANIS MAJOR]" , "What may not be seen on cloudy night" , "clearly visible shiner" , "Drags to find other name for Sirius" , "slightly flashy night-spot?" .)