To save this word, you'll need to log in.
Gym·no·din·i·um | \ ˌjim-nə-ˈdin-ē-əm 
\
\Medical Definition of Gymnodinium
: a large genus (the type of the family Gymnodiniidae) of marine and freshwater naked dinoflagellates that includes forms which are colorless or tinted yellowish to reddish brown, blue, or green by chromatophores and a few forms which cause red tide
Comments on Gymnodinium
What made you want to look up Gymnodinium? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
Challenging Vocabulary Quiz Returns!
- Which is a synonym of fuliginous?
Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridgedWords at Play
Ask the Editors
Word Games
Share Gymnodinium