Merriam-Webster Logo
SINCE 1828
Menu
dictionary thesaurus

Cycloidei

plural noun
Cy·​cloi·​dei | \ sīˈklȯidēˌī\

Definition of Cycloidei

in former classifications
: a group of fishes including those with cycloid scales (as most teleosts)

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!

Other Words from Cycloidei

cycloidian \ (ˈ)sī¦klȯidēən \ adjective or noun

History and Etymology for Cycloidei

New Latin, from cycl- + -oidei

Keep scrolling for more

Learn More about Cycloidei

Statistics for Cycloidei

Look-up Popularity

Comments on Cycloidei

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

Show Comments  Hide Comments 

WORD OF THE DAY

hiatus

Listen to the pronounciation of hiatus

a period when something is suspended

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
Dictionary Devil

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