-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]
OMA Object Management Architecture (OMG)
OMA Open Mobile Alliance (org., mobile-systems)
OMA Outlock Mobile Access (mobile-systems, PDA, WAP)