For example, oxygenic photosynthesis describes a form of photosynthesis in which oxygen is produced. In oxygenic photosynthetic bacteria (e.g. Cyanobacteria), free oxygen is produced by the light-driven splitting of water during photosynthesis. This is in contrast with anoxygenic photosynthetic bacteria, which do not produce oxygen during photosynthesis.
Word origin: from oxygen + -ic.