bis.sex.tile

adj.（形容詞）
Of or relating to a leap year.
閏年的：閏年的與閏年有關(guān)的
Of or relating to the extra day falling in a leap year.
閏年中增加的天數(shù)的：在一閏年中所增加天數(shù)的或與在閏年中增加的天數(shù)有關(guān)的
n.（名詞）
A leap year.
閏年

來源：
Late Latin bissextilis [containing an intercalary day]
后期拉丁語 bissextilis [含有閏日的]
from Latin bissextus [an intercalary day]
源自 拉丁語 bissextus [閏日]
bi- [twice] * see bi-
bi- [兩次] *參見 bi-
sextus [sixth, because the sixth day before the Calends of March (February 24) occurred twice every leap year] * see sext
sextus [第六，因為古羅馬歷三月初一（二月24日）往前推的第六天每一閏年出現(xiàn)兩次] *參見 sext