رَايءِسٌ

[act. particle n. of 1.]

كَلْبَةٌ رَايءِسٌ, (M,) or رَايءِسَةٌ, (TA,) A bitch that takes the object of the chase by the head. (M, TA.) And [in like manner] ↓ كَلْبَةٌ رَوءُوسٌ A bitch that springs upon the head of the object of the chase. (TA.)

-A2- رَايءِسٌ also signifies Anything elevated, or rising above the part or parts adjacent to it. (M, TA.) The head (↓ رَأْس) of a valley: (M, TA:) plural رَوَايءِسُ, (TA,) which signifies the upper, or uppermost, parts of valleys. (K, TA.)

-A3- سَحَابَةٌ رَايءِسٌ, (M,) or رَايءِسَةٌ, (TA,) and ↓ مُرَايءِسٌ, (M,) (assumed tropical:) A cloud preceding the other clouds: (M: [but perhaps سَحَابَةٌ in the copy of the M from which this is taken is a mistake for سَحَابٌ, i. e. clouds:]) plural رَوَايءِسُ. (K, * TA.)

See also رَيءِيسٌ, in two places.