Meaning & use
omasum
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The third chamber of the stomach in ruminant animals, such as cows, which absorbs water and nutrients from food.
See it in a sentence
The omasum helps the cow further break down food before it reaches the true stomach.
Veterinary students learn to identify the omasum among the four chambers of a cow's stomach.
A note on using this word
Ruminant animals have four stomach chambers -- rumen, reticulum, omasum, and abomasum -- each with a distinct digestive role.
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