Merriam-Webster Logo
SINCE 1828
Menu
×

An Encyclopædia Britannica Company

abomasum

play
noun ab·oma·sum \ˌa-bō-ˈmā-səm\

Definition of abomasum

plural

abomasa

play \-sə\

  1. :  the fourth compartment of the ruminant stomach that follows the omasum and has a true digestive function — compare rumen, reticulum

abomasal

play \-səl\ adjective

Explore M-W

image1694077559
Which Is The Correct Plural Spelling? (It's a Trick Question)
alt-5929a3df1de57
Trending: Brzezinski: 'The Sine Qua Non of a Stable World Order'
alt-5926e94cc0e45
'Climate' Change
decimate-video
Is it wrong to use 'decimate' to mean 'destroy'?

Origin and Etymology of abomasum

borrowed from New Latin abomāsum, from ab- ab- + omāsum omasum


First Known Use: 1678

Medical Dictionary

abomasum

play
noun ab·oma·sum \ˌab-ō-ˈmā-səm\

Medical Definition of abomasum

plural

abomasa

\-sə\play

  1. :  the fourth compartment of the ruminant stomach that follows the omasum and has a true digestive function—compare rumen, reticulum

abomasal

\-səl\play adjective

Learn More about abomasum

  1. Nglish: Translation of abomasum for Spanish speakers Britannica.com: Encyclopedia article about abomasum

Seen and Heard

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

show hide

Love words? Need even more definitions?

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

WORD OF THE DAY

unabashed

play

not embarrassed or apologetic

Get Word of the Day daily email!

TRENDING NOW

  1. sine qua non 'Something that is considered essential'

  2. suborn "to induce secretly to do an unlawful thing"

  3. nutjob 'a mentally unbalanced person'

  4. collusion 'Secret cooperation for an illegal or dishonest purpose'

  5. counsel Is it 'council' or 'counsel'?

SEE ALL

BROWSE DICTIONARY

abomasum

WORD GAMES

Take a 3-minute break and test your skills!

  • winning-words-from-the-national-spelling-bee-logo
  • Which is the correct spelling of the winning word from 1988?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Citation

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!

Words at Play

alt-5926e94cc0e45
'Climate' Change

No denying this word's history

alt-5925b73b3a62e
'Author' is a Verb

Beyond the mere act of writing

alt-592708149cf54
Don't Catch 'Flack' for Using 'Flak'

How a word for antiaircraft guns came to refer to PR pro

image1694077559
Plural Words With Multiple Spellings

Multiple spellings for "multiple" words.

Ask the Editors

decimate-video
Is it wrong to use 'decimate' to mean 'destroy'?

Language changes

serial-comma
The Serial Comma

Why don't they call it the Merriam-Webster comma?

video-irregardless-grammar-peeve-blend-of-the-synonyms-irrespective-and-regardless
Irregardless

It is in fact a real word (but that doesn't mean you should use it).

video-moose-goose-weird-plurals
Weird Plurals

One goose, two geese. One moose, two... moose. What's up with that?

Word Games

winning-words-from-the-national-spelling-bee-logo
Winning Words from Scripps Spelling Bee Quiz

Can you outdo past winners of the Spelling Bee?

Take the quiz
peter-bruegel-tower-of-babel-painting
Where in the World? A Quiz

Do you know what languages these words come from?

Take the quiz
True or False
True or False?

Test your knowledge - and maybe learn something along the way.

Take the quiz
Citation
Citation

Do you know the person or title these quotes describe?

Play the game