Multitran.ru is an editable online Russian dictionary. Contains over 4 million entries for the Russian language only, the entries are subdivided by a part of speech and by a subject or discipline.
Multitran also offers modules for translating Russian into many European languages, as well as Esperanto, Kalmyk . and Afrikaans.
ABBYY Lingvo Dictionary helps easily translate words and phrases from English into Russian and from Russian into English, as well as to and from Spanish, Italian, French, German and many other languages, including several Eurasian languages, such as Kazakh, Tatar, Turkish, Hungarian and more.
Lingvolive.com also host a lively community of translators who add to the dictionary and assist each other with thorny questions.
In Russian.
Alphabetical search by name or by professional affiliation.
In Russian.
B&E is a classic encyclopedia published as a multi-volume set in Russia in 1890-1907.