Light Bulb That Uses a Vapor Like Iodine
This page is the CodyCross answer for the clue below from Dogs, Group 1640, Puzzle 1 (Agility Exercises).
Question is: Light Bulb That Uses a Vapor Like Iodine
and the answer is: HALOGEN
Word Meaning:
HALOGEN — (chemistry) Any element of group 17, i.e. fluorine, chlorine, bromine, iodine, astatine and tennessine.
Definitions from Wiktionary.