Merriam-Webster Logo
SINCE 1828
Menu
dictionary thesaurus

Ommastrephes

noun
Om·​mas·​tre·​phes | \ əˈmastrəˌfēz\

Definition of Ommastrephes

: a widely distributed genus (type of the family Ommastrephidae) of extremely active cephalopods (order Decapoda) having a cylindrical body, large rhombic terminal fins, and short strong arms

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 Ommastrephes

New Latin, from Greek omma eye + strephein to turn

Keep scrolling for more

Learn More about Ommastrephes

Dictionary Entries near Ommastrephes

omittance

Omiya

-omma

Ommastrephes

ommateal

ommateum

ommatidium

Statistics for Ommastrephes

Look-up Popularity

Comments on Ommastrephes

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

Show Comments  Hide Comments 

WORD OF THE DAY

tortuous

Listen to the pronounciation of tortuous

marked by turns or indirection

Get Word of the Day daily email!

Test Your Vocabulary

Summer 2019 Words of the Day Quiz

  • a-bowl-of-peach-sorbet-with-cut-peaches-next-to-it
  • Which is a synonym of desideratum?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

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