American Heritage Dictionary
(2)
Century Dictionary
(5)
GNU Webster's 1913
(1)
WordNet
(4)
Elsewhere on the web
Eager to update its image without changing its antediluvian (or antebellum) substance, the party is trying to lock down its white country-club blowhards.— DailyHowler.com
That way, they would have found out what kind of antediluvian throwback they hve admitted to the EU.— timesofmalta.com
I also would condemn our nations electrical grid as absolutely antediluvian, outdated, derated, and in need of complete replacement.— Latest Articles
The video's now antediluvian-looking images have a Proustian quality for me:— Scott Rosenberg's Wordyard

American Heritage Dictionary (1)
Century Dictionary (1)
Bubble size: how much this word was used in a year
Bubble height: used more or less than expected, vs. all uses evenly distributed
You can expect to see this word several times a year.
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