The Collaborative International Dictionary of English v.0.48:
Diluvian \Di*lu"vi*an\, a. [Cf. F. diluvien.] Of or pertaining to a deluge, esp. to the Noachian deluge; diluvial; as, of diluvian origin. --Buckland. [1913 Webster]WordNet (r) 3.0 (2006):
diluvian adj 1: of or connected with a deluge [syn: diluvian, diluvial]