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gallium

gal·li·um

gallium

pronunciation:
gae li m
part of speech: noun
definition: a silvery metal chemical element that has thirty-one protons in each nucleus, usu. forms a trivalent ion, and is often used in pure form in high-temperature thermometers because it melts at just above room temperature and remains liquid up to 1983 degrees Celsius. (symbol: Ga)