GRE重点词汇解析：antediluvian

　　antediluvian:史前的;陈旧的;extremely old and antiquated

　　1) a very old (or old fashioned) person

　　2) prehistoric, before the flood

　　3) ancient;outmoded;(literally,before the flood)

　　4) antiquated;extremely ancient 、

　　5) ancient, obsolete, pre historic

　　6) antiquated;extremely ancient