أَرْأَسٌ

Having a large head; (S, M, A, Mgh, K; *) applied to a man, (S, A, Mgh,) and to a sheep or goat, (S, TA,) and to a stallion; (TA; [but فحل, there, is perhaps a mistake for رَجُلٌ;]) as also ↓ رُوءَاسِىٌّ; (S, M, A, K;) which is likewise applied to a man, (S, A,) and to a stallion, (TA,) but not to a sheep or goat; (ISk, S;) and رَوَّاسِىٌّ; (TA in article روس;) and ↓ رُوءَاسٌ; (M, TA;) applied to a stallion; (TA;) and ↓ مَرْوءُوسٌ: (K, * TA:) feminine of the first, رَأْسَاءُ. (M.)

Also رَأْسَاءُ A ewe, (S, M, K,) or she-goat, (M,) having a black head (A'Obeyd, S, M, K) and face, (S, M, K,) the rest of her being white. (S.)