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Määritelmät

Adjektiivi

1. Of fourth rank or order.
2. Of a mathematical expression containing e.g. x⁴.
3. Relating to or in number base four.
4. (organic chemistry) quaternary ammonium.
5. (inorganic chemistry) Composed of four elements.

Substantiivi

1. (chemistry) A quaternary compound.
2. (geology) The Quaternary period or the system of deposits laid down during it.