v.tr. 1 (also absol.) insert (an intercalary day etc.). 2 interpose (anything out of the ordinary course). 3 (as intercalated adj.) (of strata etc.) interposed. intercalation n.
[ L intercalare intercalat- (as INTER-, calare proclaim) ]
INTERCALATE
Meaning of INTERCALATE in English
Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012