aboral

adjective

ab·​oral (ˌ)a-ˈbȯr-əl How to pronounce aboral (audio)
: situated opposite to or away from the mouth
a sea urchin's aboral surface
aborally adverb

Word History

Etymology

ab- + oral entry 1

First Known Use

1857, in the meaning defined above

Time Traveler
The first known use of aboral was in 1857

Browse Nearby Words

Cite this Entry

“Aboral.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/aboral. Accessed 4 Feb. 2026.

Medical Definition

aboral

adjective
: situated opposite to or away from the mouth
aborally adverb
Love words? Need even more definitions?

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

More from Merriam-Webster