serrations

英[se'reɪʃənz] 美[se'reɪʃənz]
  • 锯齿流变
  • seral adj.生态演替系列的
  • unit n.单元;单位;部件;组件
名词 serration:
  1. the condition of being serrated

  2. a row of notches

  3. a single notch in a row of notches