رِعْىٌ

and ↓ مَرْعًى Pasture, or herbage; (S, Mgh, K;) the food of beasts: (Msb:) plural of the former أَرْعَاءٌ [meaning kinds, or sorts, of pasture or herbage]: (K:) and of ↓ the latter مَرَاعٍ. (Msb.) It is said in a prov., وَلَا كَالسَّعْدَانِ ↓ مَرْعًى [Pasture, but not like the سعدان: see article سعد]. (S.)

رِعْىُ الحَمَامِ وَالإِبِلِ A certain herb, having berries like myrtle-berries, in which is the least degree of sweetness; not injurious to the camels that feed upon it, but poison to [venomous or noxious reptiles or the like, such as are termed] هَوَامّ: the decoction thereof blackens the hair. (Ibn-Seenà, book ii. p. 252.)