针，刺；

1. acicula

1. 针：acicle 针 | acicula 针 | acicular 针状的

2. 针刺：achromic 无色的 | acicula 针刺 | acid conditioned reaction 酸条件反应

1. a needlelike part or structure of a plant or animal or crystal
    as a spine or bristle or crystal