[Link] Słownik języka polskiego (Dictionary of the Polish Language) sjp.pwn.pl/ [Size] 80,000 terms [Comment] 
The internet version of one of Poland's more extensive dictionaries. Provides two search windows, the first for ways the term might be used with qualifiers and for terms with similar meaning, the second for a definition of the chosen term. The latter is usually extensive and multifaceted To search for a term containing Polish diacritical marks not available on one's keyboard, type the letter without the diacritical mark and follow it with the character ` which is usually found on the top left hand side of the keyboard. The site also features an orthographic dictionary and a dictionary of foreign words.