To save this word, you'll need to log in.
he·lio·zo·an | \ ˌhē-lē-ə-ˈzō-ən 
\
\Definition of heliozoan
: any of a class (Heliozoa) of free-living spherical usually freshwater protozoans that reproduce by binary fission or budding
Keep scrolling for more
Comments on heliozoan
What made you want to look up heliozoan? 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 heliozoan
Time Traveler for heliozoan
The first known use of heliozoan was circa 1889
See more words from the same year