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A word which, with clean, was applied to personal and ceremonial conditions, as well as to the edibility of animals
The division of animals into clean and unclean existed before the Flood (Gen. 7:2). Uncleanness and the processes of purification are particularly described (Lev. 11-15; Num. 19). Unclean animals are specially mentioned (Lev. 11:9-31; Deut. 14:3-20).