desmid
/ˈdesmɪd/noun
1- Biology a single-celled freshwater alga which appears to be composed of two rigid cells with a shared nucleus. The presence of desmids is usually an indicator of unpolluted water.【生】鼓藻。
1.1
- Family Desmidiaceae, division Chlorophyta (or phylum Gamophyta, kingdom Protista).鼓藻科, 绿藻门（或接合藻门, 原生生物界）。
词源
mid 19th cent.: from modern Latin Desmidium (genus name)， from Greek desmos 'band， chain' (because the algae are often found united in chains or masses).