Ulotrichales

plural noun

Ulot·​ri·​cha·​les

: an order of green algae that includes the family Ulotrichaceae and in some classifications also Ulvaceae and that comprises freshwater or marine forms having a multicellular thallus with usually simple or branched filaments sometimes aggregated to form pseudoparenchymatous masses or sheets, asexual reproduction effected by zoospores, and sexual reproduction by fusion of isogametes or of differentiated egg and sperm cells

Word History

Etymology

New Latin Ulotrich-, Ulothrix + -ales

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.

Start your free trial today and get unlimited access to America's largest dictionary, with:

• More than 250,000 words that aren't in our free dictionary
• Expanded definitions, etymologies, and usage notes
• Advanced search features
• Ad free!