Dictionaries

Tipos de dicionários

Bilingual

http://ultralingua.com/onlinedictionary/index.html



Monolingual

http://www.oup.com/elt/catalogue/teachersites/oald7/lookup?cc=global



Technical

http://medical.dictionary.thefreedictionary.com/



Pictorial



www.pdictionary.com/

Some more:

http://www.idoceonline.com/

http://www.thefreedictionary.com/