Deposit Left Behind by Hard Water
This page is the CodyCross answer for the clue below from Trip to Spain, Group 858, Puzzle 4 (Exciting Nightlife).
Question is: Deposit Left Behind by Hard Water
and the answer is: LIMESCALE
Word Meaning:
LIMESCALE — A white, chalky deposit of calcium carbonate found in kettles, washing machines etc., especially in a hard water area.
Definitions from Wiktionary.