أَبْطَحُ
Root: بطح
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أَبْطَحُ
, originally an epithet [and therefore imperfectly decl.], that is, an epithet converted into a subst., and not used as an epithet, A wide water-course, or channel of a torrent, in which are fine, or minute, or broken, pebbles; so called because the water goes in it to the right and left; [i. e. spreads widely; see 7;] as also
بَطْحَآءُ , fem. of the former, ...