septemdecimal
英文词源
septemdecimal (adj.)
"of seventeen years," in reference to cicadas, 1885, from Latin septemdecim "seventeen" ((see seven, ten) + -al (1). Related: Septemdecimally.
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septemdecimal (adj.)
"of seventeen years," in reference to cicadas, 1885, from Latin septemdecim "seventeen" ((see seven, ten) + -al (1). Related: Septemdecimally.