ربع

رَبَاعِيَةٌ ذ The tooth that is between the ثَنِيَّة [or central incisor ] and the نَاب; (S, Msb, K;) i. e. each of the four teeth which are next to the ثَنَايَا, (Mgh, * TA,) pertaining to man and to others: (TA:) pl. رَبَاعِيَاتٌ: (S, Mgh, Msb, K:) a man has, above, [two teeth called] ثَنِيَّتَانِ, and [two called] رَبَاعِيَتَانِ, after them, and [two called] نَابَانِ, and [two called] ضَاحِكَانِ, and six أَرْحَاآء, on each side [three], and [two teeth called] نَاجِذَانِ; and the like below: (As, TA:) and the solid-hoofed animal has, after the ثَنَايَا, four رَبَاعِيَات, and four قَوَارِح, and four أَنْيَاب, and eight أَضْرَاس. (AZ, TA.) -A2- Also fem. of رَبَاعٍ [q. v.]. (S, K.)