rumen
Rumen (noun) means the first compartment of the stomach of a cow or other ruminant. Example: “The rumen is the first part of a cow's stomach.”
How to use rumen
Learner’s notesIn plain EnglishThe first chamber of a cow's stomach.
It is a technical word, used mainly in farming, veterinary and biology contexts.
Fill the gap
Can you complete this real example?
The _____ is the first part of a cow's stomach.
Etymology
Rumen was borrowed directly from the Latin word rūmen.