arcuation
  成弧作用
  ar·cu·a·tion /ˌɑrkjəˈweʃən/ 名詞
  Arc·u·a·tion n.
  1. The act of bending or curving; incurvation; the state of being bent; crookedness.
  2. Hort. A mode of propagating trees by bending branches to the ground, and covering the small shoots with earth; layering.
  ◄ ►