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第四紀

简第四纪 · 繁第四紀

Mandarin · pinyin dì sì jì

fourth period
quaternary (geological period covering the recent ice ages over the last 180,000 years)

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Characters in this entry

第: dì · sequence, number; grade, degree
四: sì · four
紀: Look up this written character
纪: jì · record, annal, historical account

Written characters and their own readings; the entry’s pronunciation is shown above.

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Mandarin tones

4–4–4 · di4 si4 ji4

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3character links1same-tone record

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Read this spelling in Classical texts

Follow a written form into the eight pinned witnesses: Analects, Mencius, Laozi, Zhuangzi, Xunzi, Han Feizi, Sunzi and the Mao Shijing. A match is a place to investigate; it does not prove that a modern dictionary sense fits the passage.

第四紀 · find source passages ↗ · 第四纪 · find source passages ↗

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Wiktionary English definitions · Chinese section

Independent source senses for this spelling, with usage labels retained. Not matched to the pronunciation above.

name

(geology) the Quaternary period (part of the Cenozoic era, spanning from 2.588 million years ago until the present)

Source page · dump 2026-09-02 · Contributors & history

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