رَزْنٌ

A place that is elevated (S, K, TA) and hard, (TA,) having in it a depression that retains the water [of the rain]: plural رُزُونٌ and رِزَانٌ: (S, K, TA:) the latter of which pls. is also plural of رِزْنَةٌ [q. v.]. (K.) It is also singular of أَرْزَانٌ signifying [Hollows, or cavities, such as are termed] نُقَرٌ [plural of نُقْرَةٌ] in stone, or in rugged ground, that retain the water [of the rain]; and so is ↓ رِزْنٌ; or, according to Ibn-Hamzeh, this latter only; and thus says IB, because a noun of the measure فَعْلٌ has not a plural of the measure أَفْعَالٌ, except in a few instances. (TA.) [The plural] رُزَونٌ also signifies The remains of a torrent in places which it has partially worn away. (TA.)