orderly marketing agreement.
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OMA «OH muh», noun.
U.S. Orderly Marketing Agreement (an agreement between governments that restricts imports of a product when it jeopardizes employment, production, and sales of the importing country's industry): »
The Administration has negotiated an OMA limiting imports of Japanese color-TV sets to 41% of their 1976 level (Time).
-oma,
suffix, plural -omas or -omata.
a growth, as a tumor or neoplasm, as in adenoma, carcinoma.
╂[< Greek -ōma, 
a noun suffix]
a noun suffix]Useful english dictionary. 2012.