volvox
/ˈvɒlvɒks/noun
1- Biology a green single-celled aquatic organism which forms minute free-swimming spherical colonies【生】团藻。
1.1
- Genus Volvox, division Chlorophyta (or phylum Chlorophyta, kingdom Protista).团藻属, 绿藻门（原生生物界）。
词源
modern Latin， from Latin volvere 'to roll'.