Aussie Banknotes, the First to Use This Material
Puzzle 13 of At the Ballet Hard Pack
Question is: Aussie Banknotes, the First to Use This Material
and the answer is: POLYMER
Word Meaning:
POLYMER — (organic chemistry) A long or larger molecule consisting of a chain or network of many repeating units, formed by chemically bonding together many identical or similar small molecules called monomers. A polymer is formed by polymerization, the joining of many monomer molecules.
Definitions from Wiktionary.