Dictionary.com
definitions

photobiotic

[foh-toh-bahy-ot-ik, -bee-]
adjective Botany, Zoology.
  1. living or thriving only in the presence of light.

Origin of photobiotic

photo- + biotic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
photobiotic in Medicine

photobiotic

[fō′tō-bī-ŏt′ĭk]
adj.
  1. Depending on light for life and growth.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.