Heliozoa

plural noun He·lio·zoa \ ˌhēlēəˈzōə \

Definition of Heliozoa

:an order of Actinopoda consisting of free-living holozoic usually freshwater protozoans that reproduce by binary fission or budding and comprise the sun animalcules — see actinophrys, actinopoda, actinosphaerium

heliozoan

\¦hēlēə¦zōən\ adjective or noun

heliozoic

\-ōik\ adjective

There's more!

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!
Already a subscriber? Log in.

Origin and Etymology of heliozoa

New Latin, from 1heli- + -zoa


Seen and Heard

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

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

a ram's-horn trumpet used in Judaism

Get Word of the Day daily email!

Test Your Vocabulary

Merriam-Webster's New Words Quiz—Fall 2017 Edition!

  • young-plant-shoots
  • Which of the following is a new sense of the word bunny?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
SCRABBLE® Sprint

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!