Definition of photophily in US English:

photophily

noun

Biology
  • The condition of being photophilic or photophil; responsiveness to light; tendency to thrive in relatively intense light.

Origin

1930s; earliest use found in Webster's New International Dictionary of the English Language. From photo- + -phily, after photophil, photophilic, photophilous.

Pronunciation

photophily

/fəʊˈtɒfɪli/