Meaning of gymnodinium

gym•no•din•i•um

Pronunciation: ( jim"nu-din'ē-um), [key]
— pl. -din•i•a
  1. any marine or freshwater dinoflagellate of the genus Gymnodinium, certain species of which cause red tide.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.