pricker

名词 pricker:

1. a small sharp-pointed tip resembling a spike on a stem or leaf
   同义词：spine, thorn, prickle, sticker, spikelet
2. an awl for making small holes for brads or small screws
   同义词：bradawl

prick.er

n.（名词）
One, such as a pricking tool, that pierces or pricks.
尖器：用来刺或戳其它物的东西，如有刺的工具
A prickle or thorn.
刺，棘