spirogyra
Concise Oxford English Dictionary © 2008 Oxford University Press:
spirogyra /ˌspʌɪrə(ʊ)ˈdʒʌɪrə/
▶noun Botany a filamentous green alga of a genus that includes blanket weed. [Genus Spirogyra.]
'spirogyra' also found in these Oxford entries:

