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