第四紀 — meaning in English
dì sì jì
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English meaning
- quaternary adj Of fourth rank or order.
Senses
第四紀 is used for these senses in English:
- Quaternary (geology) The geological period of the Cenozoic Era immediately following the Tertiary. It is subdivided into the Pleistocene and the Holocene Epochs.
quaternary — full definition
- adj Of fourth rank or order.
- adj Of a mathematical expression containing e.g. x⁴.
- adj Relating to or in number base four.
- adj quaternary ammonium.
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