👉 Post-diluvian refers to a type of language that is derived from or borrowed from the language of the pre-diluvian period. It is characterized by its use of words and grammatical structures that are similar but not identical to those used in pre-diluvian languages. The term "postdiluvian" was introduced by linguist Stephen D. Nadel, who studied the dialects of the ancient Greek language spoken in Crete during the 1970s.