Merriam-Webster Logo
SINCE 1828
Menu
dictionary thesaurus

blastid

noun
blas·tid
plural -s

Definition of blastid 

: an echinoderm or fossil of the class Blastoidea

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 blastid

blast- + -id

Keep scrolling for more

Learn More about blastid

Dictionary Entries near blastid

blast heater

blasthole

-blastic

blastid

blastie

blastier

blastiest

Statistics for blastid

Look-up Popularity

Comments on blastid

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

Show Comments  Hide Comments 

WORD OF THE DAY

brouhaha

a state of commotion or excitement

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
True or False

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

TAKE THE QUIZ
Word Winder's CrossWinder

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