رَيَّانُ
1.
[originally رَوْيَانُ] an epithet from رَوِىَ; (T, M, Mgh, Msb, K;) Satisfied with drinking [of water and of milk &c.]; having drunk [thereof] enough to quench, or satisfy, his thirst; opposite of
عَطْشَانُ: (S, Mgh: *) feminine رَيَّا, (T, S, M, Mgh, Msb, K,) in which the ى is not changed into و because the word is an epithet; for it is changed into و only in a subst., of the measure فَعْلَى, of which ى is the final radical, as in تَقْوَى; so that if it were a subst., it would be رَوَّى; (S, M;) originally رَوْيَا: (M:) as to رَيَّا that is thought to be used as the proper name of a woman, it is, thus used, an epithet, like الحَارِثُ and العَبَّاسُ, though without the article ال: (S, * M:) the plural is روَاءٌ, (T, S, M, Mgh, Msb, K,) with kesr and medd., (S,) in measure like كِتَابٌ, (Msb,) masculine and feminine (Mgh, Msb.) You say قَوْمٌ رِوَاءٌ مِنَ المَاءِ [A people, or party, satisfied with drinking of water]. (S.)
2.
And نَبْتٌ رَيَّانُ and شَجَرٌ رِوَاءٌ [A plant, or herbage, and trees, having plentiful irrigation: or flourishing and fresh, luxuriant, juicy, succulent, or sappy, by reason of plentiful irrigation: see the verb]. (M.)
3.
[Hence,] رَيَّانُ signifies also (assumed tropical:) Full of fat and flesh. (JM.) And you say وَجْهٌ رَيَّانُ (tropical:) [A plump face]; an expression of dispraise [apparently when relating to a man, but not otherwise; for رَيَّانُ, or رَيَّا, applied to a youth, or to a woman, or a limb of a woman, meaning plump and juicy, is used by way of praise]: opposed to وَجْهٌ ظَمْانُ. (A and TA in article ظمأ.) And اِمْرَأَةٌ رَيَّا المُخَلْخَلِ (assumed tropical:) [A woman full, or plump, in the place of the anklet]. (JM.) And فَرَسٌ رَيَّانُ الظَّهْرِ (assumed tropical:) A horse fat in the portion of flesh and sinew next the back-bone on each side. (T.)