Heterosiphonales

plural noun

Het·​er·​o·​si·​pho·​na·​les

¦hetərōˌsīfəˈnā(ˌ)lēz

: an order of yellow-green algae comprising the siphonaceous members of the class Xanthophyceae and including the single genus Botrydium

Word History

Etymology

New Latin, from heter- + siphon- + -ales

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