American Heritage Dictionary
(1)
Century Dictionary
GNU Webster's 1913
WordNet
(1)
Elsewhere on the web
Strange Maps collecting cartographic curiosa paranormaaliblogi. net— WordPress.com Top Blogs
El blog de Randy: Las galaxias conquistamos porque somos muy humanos Strange Maps collecting cartographic curiosa— WordPress.com Top Blogs
Chapbooks, Broadsides, and Ballads: a curious byway of book-collecting this, for the knowledge to be gleaned from these curiosa is not probably of great value.— The Book-Hunter at Home
Et a curiosa turba badodorum.— Le Malade Imaginaire. English
Here is particularly observable the curiosa felicitas, a fruitful soil and careful cultivation.— Lives of the English Poets : Prior, Congreve, Blackmore, Pope

American Heritage 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 about once a year.