ربع

رَبَاعٌ ذ : see an ex. in the phrase هُمْ عَلَى رَبَاعِهِمْ, voce رِبْعَةٌ. -A2- رَبَاعٍ, (S, Msb, K,) like ثَمَانٍ (S, K) and يَمَانٍ [in the CK ثَمَانٌ and ثَمَانٍ] and شَنَاحٍ and [pls. like] جَوَارٍ, which are the only words of this form, (K,) and رَبَاعٌ, (Kr, K,) accus. of the former رَبَاعِيًا, (S, Msb, K,) and fem. رَبَاعِيَةٌ, (S, K,) Shedding its tooth called the رَبَاعِيَة, q. v.; applied to the sheep or goat in the fourth year, and to the bull and cow and the solid-hoofed animal in the fifth year, and to the camel in the seventh year : (S, Msb, K:) [see 4:] pl. [of pauc.] أَرْبَاعٌ (Az, K) and [of mult.] رُبُعٌ (Az, S, Msb, K) and رُبْعٌ, (Th, Az, K,) but the former is the more common, (Az,) and رُبَعٌ (IAar, K) and رِبْعَانٌ (S, Msb, K) and رِبَاعٌ and رَبَاعِيَاتٌ. (K.) You say, رَكِبْتُ بِرْذَوْنًا رَبَاعِيًا [ I rode a hackney shedding his رَبَاعِيَة, or in his fifth year ]. (S, Msb, K.) ― -b2- Hence, حَرْبٌ رَبَاعِيَةٌ (assumed tropical:) Vehement and youthful war. (TA.)