Definitions
noun
a unit of nuclear cross section; the effective circular area that one particle presents to another as a target for an encounter
noun
originally thought to be a single vitamin but now separated into several B vitamins
noun
aerobic rod-shaped spore-producing bacterium; often occurring in chainlike formations; found primarily in soil
noun
a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder
noun
the 2nd letter of the Roman alphabet
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