Crossword puzzle clue "useful discovery of 1898"

Here are the possible solutions for useful discovery of 1898 clue

Answer
Clue
Relevancy
neon
Clue
Useful discovery of 1898.
An 1898 discovery
Glowing discovery of 1898
Discovery of 1898
1898 chemical discovery
Scientific discovery of 1898
Ramsay-Travers discovery: 1898
Gas discovery of 1898
Definition
a gaseous element

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