Combinatorial and Medical Chemistry Glossary
- By Combinatorial Chemistry Review.
- http://www.combichemistry.com/medical-chemistry-glossary.html

Chemicool.com: Chemistry Dictionary
- Created by David D. Hsu of the Massachusetts Institute of Technology and his collaborators.
- http://chemicool.com/dictionary.html

Archaic Chemical terms
- Glossary of archaic chemical terms with references to related literature.
- http://web.lemoyne.edu/~giunta/archema.html

UNCChem Glossary
- Basic formulae and words used in chemistry.
- http://development.shodor.org/UNChem/glossary.html

General Chemistry Online: Glossary
- Searchable and browsable by topic or letter. Part of General Chemistry Online! by Fred Senese at Frostburg State University.
- http://antoine.frostburg.edu/chem/senese/101/glossary.shtml

Physical Organic Chemistry Terms
- Indexed glossary of terms collected by the International Union of Pure and Applied Chemistry.
- http://www.chem.qmw.ac.uk/iupac/gtpoc/index.html

Chemistry & Environmental Dictionary
- Contains definitions for many chemistry, environmental and other related technical terms and acronyms.
- http://environmentalchemistry.com/yogi/chemistry/dictionary/

Chemical Safety Information
- Glossary of terms relating to chemical safety and chemistry in general.
- http://physchem.ox.ac.uk/MSDS/glossary.html