abomasum aboma • abomasus · · · Info · Definitions · Synonyms · Characters · · abomasum · · Text Latin · · Script 8 · · Length Definitions · · · (noun) the fourth compartment of the stomach of a ruminant; the one where digestion takes place. Synonyms: fourth stomach. · · Noun Definition 1 Synonyms · · · fourth stomach · · Synonym 1 Characters · · a latin small letter a U+0061 b latin small letter b U+0062 m latin small letter m U+006D o latin small letter o U+006F s latin small letter s U+0073 u latin small letter u U+0075