ac·​ti·​noph·​rys | \ ˌak-tə-ˈnä-frəs, ak-ˈti-nə- \

Definition of actinophrys

1 capitalized : a genus of protozoans (order Heliozoa) widely distributed in stagnant water
2 plural actinophrys : a protozoan of the genus Actinophrys

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!

First Known Use of actinophrys

1840, in the meaning defined at sense 1

History and Etymology for actinophrys

New Latin, from actin- + Greek ophrys brow, rim

Keep scrolling for more

Learn More about actinophrys

Time Traveler for actinophrys

Time Traveler

The first known use of actinophrys was in 1840

See more words from the same year

Statistics for actinophrys

Cite this Entry

“Actinophrys.” Dictionary, Merriam-Webster, Accessed 25 Oct. 2020.

Comments on actinophrys

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


Test Your Vocabulary

Namesakes Word Quiz

  • a citrus fruit possibly named after a person
  • Which of the following is a fruit named after a Moroccan seaport?
Spell It

Can you spell these 10 commonly misspelled words?

Syn City

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

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