Construction Material Made of Gypsum Panels
This page is the CodyCross answer for the clue below from Underground Worlds, Group 2169, Puzzle 3 (Delaware Aqueduct).
Question is: Construction Material Made of Gypsum Panels
and the answer is: DRYWALL
Word Meaning:
DRYWALL — A building material comprising a sheet of gypsum sandwiched between two pieces of heavy paper, used mainly for interior walls and ceilings.
Definitions from Wiktionary.