تَسْنِيمٌ

[originally verbal noun of 2, q. v.,] A certain water in Paradise; so called because running above the elevated chambers (S, K *) and the pavilions: mentioned in the Qur'an, 83:27: (S:) or a certain fountain, or source, (عَيْنٌ,) in Paradise: so they assert; and this requires its being determinate, imperfectly decl.: or, according to Zj, a water coming upon them from above, from the elevated chambers: (M:) or a certain fountain, or source, coming upon them from above. (K [and in like manner Az explains it].)