tert-Wiktionary 原文英美词源链原始印欧语Proto-Indo-European约前 4500–前 2500 年*tritós↓ 继承原始意大利语族语Proto-Italic*tritios↓ 继承拉丁语Latin约前 75–公元 3 世纪tertius‘third’↓ 派生英语Englishtert-词源说明Derived from Latin tertius (“third”).释义前缀prefix1(organic chemistry) tertiary form.2Third.