a. - Of or pertaining to a flood or deluge, esp. to the great
deluge in the days of Noah; diluvian.
a. - Effected or produced by a flood or deluge of water; --
said of coarse and imperfectly stratified deposits along ancient or
existing water courses. Similar unstratified deposits were formed by
the agency of ice. The time of deposition has been called the Diluvian
epoch.