SINCE 1828
dictionary
thesaurus

Spio

noun
Save Word
\ ˈspī(ˌ)ō \

Definition of Spio

: a widely distributed genus (the type of the family Spionidae) of small burrowing marine polychaete worms without tentacles or palps but with enlarged dorsal cirri acting as gills

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!

History and Etymology for Spio

New Latin Spion-, Spio, perhaps from Latin Spio, one of the Nereids, from Greek Speiō

Learn More About Spio

Dictionary Entries Near Spio

spiny-skinned

Spio

spionid

See More Nearby Entries 

Statistics for Spio

Cite this Entry

“Spio.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Spio. Accessed 2 Jul. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

WORD OF THE DAY

apposite

Listen to the pronunciation of apposite

See Definitions and Examples »

Test Your Vocabulary

Which Word Does Not Belong?

  • one green toy robot amidst many red toy robots
  • Which of these words does not mean "nonsense"?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Words at Play
Ask the Editors
Word Games