Science Glossaries, Dictionaries, and Encyclopedias

English Manager Science Editing includes links to extensive glossaries in all areas of the sciences.  Appropriate for all age groups.

Onelook.com Dictionary and Glossary List - Science is an index of other glossaries and dictionaries.  Appropriate for all age groups.

ScienceMaster Glossary of General Science Terms is an extensive glossary of general science terms that is most appropriate for high school and college students.

YourDictionary.com - Science includes a variety of science dictionaries and glossaries, including science and technology and social science dictionaries.  Most appropriate for college students.