مَصَبٌّ

[ A place where water, or the like, pours out or forth, from a river into another river or into the sea &c., or from a tank or a gutter &c., and from high ground into a valley (see ضَاجِعَةٌ); and a sink, or sink-hole: plural مَصَابُّ (occurring in the S and K in article رفق, &c.).]