Glossary of applied linguistics

http://victorian.fortunecity.com/vangogh/555/Spell/glos-spel.html

Glossary of grammical terms


http://www.cs.cf.ac.uk/fun/welsh/Glossary.html

Languages of the World
http://www.ethnologue.com/
ONLINE RESOURCES FOR ENDANGERED LANGUAGES
http://www.hrelp.org/languages/resources/orel/

Lexicon of linguistics
http://www2.let.uu.nl/UiL-OTS/Lexicon/