actinobranch

noun

ac·​tin·​o·​branch
ak-ˈti-nə-ˌbraŋk
variants or actinobranchia
¦ak-tə-(ˌ)nō-ˈbraŋ-kē-ə
plural -s
: a gill-like organ of certain Anthozoa

Word History

Etymology

New Latin actinobranchia, from actin- + branchia

First Known Use

circa 1901, in the meaning defined above

Time Traveler
The first known use of actinobranch was circa 1901

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!

Dictionary Entries Near actinobranch

Cite this Entry

“Actinobranch.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/actinobranch. Accessed 29 Nov. 2024.

Love words? Need even more definitions?

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