Also found in: Thesaurus, Medical, Encyclopedia.


n. pl. ab·o·ma·sa (-sə)
The fourth division of the stomach in ruminant animals, such as cows, sheep, and deer, in which digestion takes place.

[New Latin abomāsum : Latin ab-, ab- + Latin omāsum, tripe; see omasum.]

ab′o·ma′sal (-səl) adj.


(Zoology) of or relating to the abomasum
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.abomasal - relating to the abomasum (the fourth compartment of the stomach of ruminants)abomasal - relating to the abomasum (the fourth compartment of the stomach of ruminants)
References in periodicals archive ?
The animals were surgically fitted with ruminal and abomasal cannulas approximately 30 days prior the experiment.
Abomasal bloat associated with Sarcina-like bacteria in goat kids.
Abomasal nematodes of small ruminants slaughtered in Bahir Dar Town, North West Ethiopia.
It is rather difficult to measure the dietary protein digestion values, not only because of the difficulty to have animals prepared with abomasal, duodenal or ileal cannulas, but also because microbial and endogenous nitrogen is added to the protein fraction of the diet (Orskov, 1982).
The stem bark extract of Acacia oxyphylla against Ascaridia galli (Nematode), seeds of Carum capticum against gastrointestinal nematodes of sheep, aqueous and ethanolic leaf extract of Adhatoda vasica has been observed for ovicidal as well as larvicidal activity against nematodes, leaves of Artimesiabervifolia (wormwood) and Zanthxylumzanthoxyloides (Fagara a native tree from Africa) in the form of powder has been proved effective upto 65% against eggs of Haemonchuscontortus in abomasum, hay of Cassava forage has been proved effective against eggs and larva of abomasal and intestinal nematodes of sheep and goats,
Occurrence of infiltrative lipoma with remarkable abomasal ulcers in a lamb--a case report.
Congenital abomasal fistula in a buffalo calf and its successful treatment.
Previous reports showed that abomasal administration of ARG enhanced milk production in dairy cows [1], improved the nitrogen metabolism in heifers [2], and enhanced the immunity and growth performance of pre-ruminant calves [3].