Chemical Also Known as Calcium Oxide

This page is the CodyCross answer for the clue below from Architectural Styles, Group 1171, Puzzle 5 (Guggenheim Museum).

Question is: Chemical Also Known as Calcium Oxide

and the answer is: QUICKLIME

Word Meaning:

QUICKLIME — Calcium oxide, which is produced by heating (calcining) limestone and gives slaked lime on treatment with water.

Definitions from Wiktionary.