Element with a low atomic number that is not found naturally on Earth Crossword Clue
5 letters · New York Times · Friday, June 21, 2013 · 37-Across
Appeared in 1 New York Times Crossword: Friday, June 21, 2013.
Exact puzzle match · New York Times · June 21, 2013 · 37-Across · 5 letters
BORON0 of 5 letters revealed
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What does this clue mean?
a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder
noun
WordNet® (Princeton University)
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