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oma·sum | \ ō-ˈmā-səm 
\
\ plural omasa\ ō-ˈmā-sə \
\Definition of omasum
: the third chamber of the ruminant stomach that is situated between the reticulum and the abomasum — compare rumen
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More Definitions for omasum
omasum
nounoma·sum | \ ō-ˈmā-səm \
\ plural omasa\ -sə \
\Medical Definition of omasum
: the third chamber of the ruminant stomach that is situated between the reticulum and the abomasum
— called also manyplies, psalterium
— compare rumenComments on omasum
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Time Traveler for omasum
The first known use of omasum was in 1556
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