OVA is an abbreviation for the term 'OVULE', which is a scientific term for the seeds of a plant. Ovules are the female reproductive organs of a plant, and they contain the embryo of the seed that will eventually grow into a new plant. The ovules are protected by a tough outer layer, and when the conditions are right, the ovules will be released from the plant and can be used to propagate new plants. Therefore, OVA is an abbreviation for the scientific term for seeds, scientifically known as ovules.