The Collaborative International Dictionary of English v.0.48:

-oma \-o"ma\suff. [Gr. ?, ?.]
   A suffix used in medical terms to denote a morbid condition
   of some part, usually some kind of tumor; as in fibroma,
   glaucoma.
   [1913 Webster]

V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

OMA
       Object Management Architecture (OMG)


V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

OMA
       Open Mobile Alliance (org., mobile-systems)


V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

OMA
       Outlock Mobile Access (mobile-systems, PDA, WAP)


The Free On-line Dictionary of Computing (30 December 2018):

OMA

   Object Management Architecture.

   A set of standards under study by the OMG.

   (1994-11-11)