echinoid
1. "echinoid:an echinoderm of the class Echinoidea, which includes the sand dollars and sea urchins."
"海胆:一种属于海胆纲的棘皮动物,包括沙钱和海胆."
2. regular echinoid
正形海胆(动)
3. Standard Guide for Conducting Static Acute Toxicity Tests with Echinoid Embryos
用海胆纲胚胎做静态剧毒试验的标准指南
4. irregular echinoid
非正形海胆(动)