spline
noun [ C ] uk/splaɪn/ us/splaɪn/
（建筑时使用的）塞缝片
a long, thin piece of wood or metal used in building
（机械上使用的）花键;齿条;键槽条
a long, thin part that fits into another part of a machine and makes it turn
mathematics specialized样条曲线
a curve that connects particular points