plural noun Xan·tho·phy·ce·ae

Definition of Xanthophyceae

  1. :  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

Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Join MWU now and get access to America’s largest dictionary, with:

  • 300,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Origin and Etymology of xanthophyceae

New Latin, from xanth- + -phyceae

Seen and Heard

What made you want to look up Xanthophyceae? Please tell us where you read or heard it (including the quote, if possible).


feeling or affected by lethargy

Get Word of the Day daily email!