n, pl  -omas  or  -oma*ta   1  :  a mass of tissue formed in the uterus following pregnancy that contains remnants of chorionic or decidual tissue  2  :  decidual tissue induced in the uterus (as by trauma) in the absence of pregnancy .
 
 
 
Similar sounding terms:  di·a·ste·ma  di·so·di·um  Dis·to·ma 
 
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