actine

1 of 2

noun

ac·​tine
ˈak-ˌtīn,
-tən
plural -s
: a star-shaped spicule (as of a sponge)

-actine

2 of 2

adjective combining form

¦ak-(ˌ)tīn,
-tən
: having (such or so many) rays
discoactine
pentactine
especially in terms applied to sponge spicules

Word History

Etymology

Noun

Greek aktin-, aktis ray

Adjective combining form

Greek aktin-, aktis

First Known Use

Noun

1887, in the meaning defined above

Time Traveler
The first known use of actine was in 1887

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 actine

Cite this Entry

“Actine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/actine. Accessed 30 Nov. 2022.

Love words? Need even more definitions?

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


Words Named After People

  • name tags
  • Namesake of the leotard, Jules Léotard had what profession?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ