na  /nɑ/
1. a silvery soft waxy metallic element of the alkali metal group; occurs abundantly in natural compounds (especially in salt water); burns with a yellow flame and reacts violently in water; occurs in sea water and in the mineral halite (rock salt)
synset: sodium, Na, atomic_number_11
Princeton University "About WordNet." WordNet. Princeton University. 2010.
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