“针状物”的英语？

'针'.''''.'状物'.''精细尖锐的突出物, 如海胆的脊椎骨或水晶球.A fine, sharp projection, as a spine a sea urchin or a crystal.针状物精细尖锐的突出物, 如海胆的脊椎骨或水晶球.A fine, sharp projection, as a spine of a se...