spline /splaɪn/

• 1. 

  N any one of a series of narrow keys (external splines) formed longitudinally around the circumference of a shaft that fit into corresponding grooves (internal splines) in a mating part: used to prevent movement between two parts, esp in transmitting torque 花键

• 2. 

  V to provide (a shaft, part, etc) with splines 在(轴、零件上等)装花键