• (a.) Requiring light to live; incapable of living without light; as, photobiotic plant cells.
(fo″to-bi-ot´ik) living only in the light.
Pho`to·bi·ot'ic adjective [ Photo- + biotic .] (Biol.) Requiring light to live; incapable of living without light; as, photobiotic plant cells. 
Type: Term Pronunciation: fō′tō-bī-ot′ik Definitions: 1. Living or flourishing only in the light.
photobiotic 1. In biology, dependent upon light for existence. 2. Used to describe organisms that need light in order to live and grow.