intercalare
intercalare 〈拉〉(罗马法) (1)加入;插入;添加 (2)设置闰日或闰月 即在历法中加入的日子或月份。
intercalare (in-t[schwa]r-k[schwa]-lair-ee), vb. [Latin] Civil law. To introduce or insert among others; esp., to introduce a day or month into the calendar. • From this Latin term derives the rare English word intercalate, roughly synonymous with interpolate.