Chemical Used in Water to Strengthen Teeth
This page is the CodyCross answer for the clue below from Trip to Spain, Group 843, Puzzle 2 (Canary Islands).
Question is: Chemical Used in Water to Strengthen Teeth
and the answer is: FLUORIDE
Word Meaning:
FLUORIDE — (chemistry) A binary compound of fluorine and another element or radical.
Definitions from Wiktionary.