Build-Up of Chalky Calcium Carbonate

This page is the CodyCross answer for the clue below from Concert Hall, Group 585, Puzzle 4 (Ride of the Valkyries).

Question is: Build-Up of Chalky Calcium Carbonate

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.

Build-up Of Chalky Calcium Carbonate - Concert Hall CodyCross Answers | CodyCross Solutions