Tomopteris

noun

To·​mop·​ter·​is

-rə̇s

: a genus (the type of the family Tomopteridae) of transparent free-swimming marine polychaete worms having long deeply divided or forked parapodia

Word History

Etymology

New Latin, from Greek tomos slice, section + pteris fern; from its fernlike shape

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!