Chemical Substance That Cannot Be Broken Down
This page is the CodyCross answer for the clue below from Prehistory, Group 1253, Puzzle 4 (Deinosuchus).
Question is: Chemical Substance That Cannot Be Broken Down
and the answer is: ELEMENT
Word Meaning:
ELEMENT — One of the simplest or essential parts or principles of which anything consists, or upon which the constitution or fundamental powers of anything are based.
Definitions from Wiktionary.