The term "oma" has multiple meanings depending on the context. Here are the different meanings based on the search results:

• Medical terminology: In medical terminology, "oma" is a suffix meaning "tumor" or "cancer," as in carcinoma. It is often added to the name of the affected body part, such as lymphoma, which is cancer of the lymph.

• Language: In some languages, "oma" can mean "grandma," "granny," or "nan".

• Obesity Medicine Association: The Obesity Medicine Association (OMA) is an organization of healthcare providers who take a comprehensive, evidence-based approach to treating obesity. Their approach is comprised of nutrition, physical activity, behavior, and medication - OMAs four pillars.

• Architecture: OMA stands for the Office for Metropolitan Architecture, a Dutch architectural firm founded by Rem Koolhaas. The firm is known for its innovative and unconventional designs, and has worked on projects around the world.

In summary, "oma" can refer to a medical suffix, a term of endearment in some languages, an organization focused on treating obesity, or an architectural firm.