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quaternary, quaternate | consisting of or especially arranged in sets of four | ||
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four, 4, IV, quartet, foursome, quadruplet, tetrad, quatern, quaternion, quaternary, quaternity, Little Joe | the cardinal number that is the sum of three and one | ||
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Quaternary, Quaternary period, Age of Man | last 2 million years | ||
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fourth, 4th, quaternary | coming next after the third and just before the fifth in position or time or degree or magnitude |