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quaternary Definition

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quaternary
adjective(qua-ter-na-ry)
of, relating to, or consisting of four units or members
quaternary
adjective(qua-ter-na-ry)
of, relating to, or being a number system with a base of four
quaternary
adjective(qua-ter-na-ry)
of, relating to, or being the geological period from the end of the Tertiary to the present time or the corresponding system of rocks
quaternary
noun(qua-ter-na-ry)
the Quaternary period or system of rocks
quaternary
noun(qua-ter-na-ry)
a member of a group fourth in order or rank
quaternary
noun(qua-ter-na-ry)
any of numerous strong bases and their salts derived from ammonium by replacement of the hydrogen atoms with organic radicals and important especially as surface-active agents, disinfectants, and drugs

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