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词汇 circadian
词源

circadian adj.

coined 1959 by German-born biologist Franz Halberg, from Latin circa "about" (alternative form of circum "round about;" see circum-) + diem, accusative singular of dies "day" (from PIE root *dyeu- "to shine"). The original use is in circadian rhythm.

updated on December 14, 2017

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更新时间:2025/5/1 3:32:48