7 links
Barkley's Comprehensive Financial Glossary
oasismanagement.com
Comprehensive glossary of finance and investment terminology.
CBT Futures and Options
cbot.com
Chicago Board of Trade's glossary of futures and options terminology.
Money Systems
transaction.net
Glossary of financial terms relating to currency with in-depth explanations.
Yahoo! Financial Glossary
biz.yahoo.com
Extensive, cross-referenced glossary of financial and related terms.