a tooth having two cusps or points; located between the incisors and the molars
同义词：bicuspid
premolar详细解释
pre.mo.lar n.（名词）One of eight bicuspid teeth located in pairs on each side of the upper and lower jaws behind the canines and in front of the molars.前臼齿：位于臼齿之前大齿之后上下颚两边的八颗成对的前臼齿 【引伸】 premo.lar adj.（形容词）
