plural noun

Definition of Xanthophyceae

: a class of algae (division Chrysophyta) in which the green pigments of the chromatophores are partially masked by xanthophyll and reserves are commonly stored in the form of oil and which comprise the yellow-green algae

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History and Etymology for Xanthophyceae

New Latin, from xanth- + -phyceae

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tremendous in size, volume, or degree

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