plural noun
Het·​ero·​kon·​tae | \ ˌhetərōˈkän‧ˌtē\

Definition of Heterokontae

in some classifications
: a class of algae equivalent to Xanthophyceae that includes all the yellow-green algae having flagella of unequal length — compare isokontae

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History and Etymology for Heterokontae

New Latin, from heter- + -kontae (from Greek kontos punting pole, from kentein to prick, goad); from the unequal length of the flagella

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appealing forcibly to the mind or reason

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