Glow Naturally
This page is the CodyCross answer for the clue below from Cruise Ship, Group 655, Puzzle 3 (Sunglasses).
Question is: Glow Naturally
and the answer is: FLUORESCE
Word Meaning:
FLUORESCE — (intransitive, physics) To emit electromagnetic radiation, especially visible light, when absorbing radiation of some other wavelength.
Definitions from Wiktionary.