Echinoidea
noun plural
Ech·i·noi·dea
| \ ˌek-ə-ˈnȯi-dē-ə
\
\
Medical Definition of Echinoidea
: a class of motile bottom-dwelling echinoderms comprising the sea urchins and related forms
Other Words from Echinoidea
echinoid
\
ˈek-ə-ˌnȯid
\
noun
\
noun
Learn More About Echinoidea
Cite this Entry
“Echinoidea.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/Echinoidea. Accessed 27 Sep. 2021.
Style: MLA
MLA
Chicago
APA
Merriam-Webster
Chicago
APA
Merriam-Webster
Test Your Vocabulary
Difficult Spelling Words Quiz
-
- Which is the correct spelling?
Test your visual vocabulary with our 10-question challenge!
TAKE THE QUIZ
Spell words. Make bears.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Words at Play
Ask the Editors
Word Games
-
That Sounds Right/Write/Wright
A tricky quiz about soundalike words
Take the quiz
-
Name That Thing: Animal Edition
How many animals can you identify?
Take the quiz
-
Name That Thing
Test your visual vocabulary with our 10-question ...
Take the quiz
-
SCRABBLE® Sprint
SCRABBLE® fans, sharpen your skills!
Play the game
Share Echinoidea