antediluvian (adj.) Look up antediluvian at Dictionary.com
"before Noah's flood," 1640s, from Latin ante "before" (see ante-) + diluvium "a flood" (see deluge (n.)). Hence (humorously or disparagingly) "very antiquated" (1726). Coined by English physician Sir Thomas Browne (1605-1682). As a noun meaning "person who lived before the Flood," from 1680s. Related: antediluvial (1823).