כָּעוּס, (part. pass. of כָּעַס) an excited serpent. Sabb. 62ᵇ (play on תעכסנה, Is. III, 16) ומכניסות … כארס בכ׳ they caused lust to seize their (the men’s) hearts (as hot as) as the venom of the excited serpent; (older eds. כארס נחש כעוס; Ms. O. כא׳ של עכנה, Ms. M. כאש בנעורת); Yoma 9ᵇ; Yalk. Is. 264.—V. כָּעַס.