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septemdecimal的词源解释,septemdecimal来源

septemdecimal(adj.)

"十七年的",1855年,最初并通常指蝉,源自拉丁语 septemdecim "十七"(见 seventen)+ -al(1)。相关: SeptemdecimallySeptemdecenary "每17年发生一次",也指蝉,最早见于1843年(在威廉·柯比和威廉·斯彭斯的《昆虫学导论》中,这是一份词源学/昆虫学联系的报告)。

They never descend very deeply into the earth, but remain about the tender fibres of the roots. The only change they appear to undergo in their subterranean pilgrimage of seventeen long years is increase of size. As the time of their transformation approaches, they rise to near the surface of the earth, form cemented cells, in which they pass their pupa state, after which they burst the skin on the back and ascend the first tree, and again perform their septemdecimal offices of generation. [John Hooper, report on the seventeen-year locust, in "Annual Report of the American Institute," New York, 1855] 
它们从不深入地下,而是留在根的嫩纤维周围。它们在十七年的地下旅程中似乎唯一经历的变化是体积的增加。当它们变形的时间接近时,它们升到地表附近,形成胶合细胞,在其中度过蛹期,之后它们在背部爆裂皮肤,攀上第一棵树,再次执行它们的十七年一次的繁殖任务。[约翰·胡珀(John Hooper),关于十七年蝉的报告,《美国学会年报》,纽约,1855年] 

该词起源时间:1855年