acorn worm

noun

Definition of acorn worm

: any of a class (Enteropneusta) of burrowing wormlike marine animals having an acorn-shaped proboscis and classified with the hemichordates

First Known Use of acorn worm

circa 1889, in the meaning defined above

Keep scrolling for more

Learn More about acorn worm

Time Traveler for acorn worm

Time Traveler

The first known use of acorn worm was circa 1889

See more words from the same year

Statistics for acorn worm

Cite this Entry

“Acorn worm.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/acorn%20worm. Accessed 13 Aug. 2020.

More from Merriam-Webster on acorn worm

Britannica.com: Encyclopedia article about acorn worm

Comments on acorn worm

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

WORD OF THE DAY

Test Your Vocabulary

Original Meanings Quiz

  • rembrandt painting a young scholar and his tutor
  • Which of the following is the earliest known sense of the word awe?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Bee Cubed

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!