الشِّعْرَى العَبُورَ
1.
[The star Sirius;] a certain bright star; (TA;) one of the
شِعْرَيَانِ, which [in the order of rising] is after, or behind, [in the TA, erroneously, “ with, ”] الجَوْزَاء [here meaning Gemini]: (S, O:) called العبور because of its having crossed the Milky Way. (S, O, TA.) [See also الشِّعْرَى in article شعر.
2.
Hence the saying, عَصَفَتْ دَبُورُهُ وَسَقَطَتْ عَبُورُهُ, explained in article دبر.]