Question

acantha
a.can.tha  AHD[…-k²n“th…]   DJ[*6k#nG*]  KK[*6k#nG*]
n.（名词）  【复数】a.can.thae[-th¶]  
    A sharp spiny part or structure, such as the spinous process of a vertebra.
    脊柱，椎骨脊突：带尖刺的部位或结构，如脊椎动物的棘状突起
ORIGIN
Greek [thorn]
    希腊语 [刺]