Chemical Encyclopedia & Dictionaries

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Dictionaries General | Medical | Chemical

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RefCard: Reference Card for Chemists


Chemical Encyclopedia


Chemical Terminology IUPAC Nomenclature| Terminolgy & Glossay



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Measurement Encyclopedia Glossary of MSDS terms Nomenclature of Carbohydrates
Encyclopedia of Molecular Cell Biology and Molecular Medicine Glossary of chemical terms

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D i c t i o n a r i e s        To the Top







 Merriam Webster’s Dictionary 
Use single word; e.g. spectroscopy; immunoassay, EDTA, Chromatography

General and Language Dictionaries


Merriam Webster’s Dictionary and Thesaurus (above) Dictionary including S&T terms (Definition + 10 most popular sites + related links)

bullet Dictionaries, Thesaurus, Translators and Conjugators
bullet BEILSTEIN Dictionary German-English and  English-German
bullet German-English Chemistry Dictionary


BioMedical Dictionaries

bullet English Dictionary of Medical Terms (1- 92 pp.) Part of the “Multilingual Glossary of technical and popular medical terms in nine European Languages” (Browse by language)Heymans Institute of Pharmacology and Mercator School, Department of applied Linguistics
bullet Fast Health Merriam Webster’s Medical Dictionary Search dictionary or click alphabetical index (A-Z) directly, plus a Search box for health information by key word, including chemical names
bullet Medical Dictionary Online A very useful  and comprehensive dictionary to find definitions of substances involved in the biochemical/biomedical field
bullet Medi-lexicon Dictionary  medical, pharmaceutical, biomedical & healthcare acronyms and abbreviations 25/04/04
bullet  On-line Medical Dictionary Useful Options i. Select from A -Z; or ii. Other characters (including systematic chemical names) or iii. Entries by subject area; Contains terms relating to biochemistry, cell biology, chemistry, medicine, molecular biology, physics, plant biology, radiobiology, science and technology


Chemistry Dictionaries

bullet Ashford’s Dictionary of Industrial Chemicals  Sample Pages Free full-text 80 pages (PDF) The Dictionary is 1280 pp
bullet Academic Press Dictionary of Science and Technology  Search box, A-Z field linked to term  indexes,  in all areas of chemistry/related (life and physical sciences)
bullet Chemistry and Environmental Dictionary 14/02/04
bullet‘s Combined Chemical Dictionary (Free Membership); Chapman & Hall/CRC; 6 Chemical Dictionaries (more than 450,000 compounds) including Dictionary of Analytical Reagents
bullet Dictionary of Units
bullet ENGLISH -GERMAN Dictionary of Chromatographic Terms
Electrochemistry Dictionary
bullet Food Starch Dictionary 
bullet Life Science Dictionary (Home page BioTech) U of Texas; 
bullet Lubrication and Oil Analysis Dictionary Covers technical terms including areas of Environmental Science such as corrosion
bullet Dictionary of Scientific Quotations
bullet Dictionary of Metal Terminology
bullet MSDS Dictionaries, Glossaries, Abbreviations (MSDS = material safety data sheets)
bullet Starch & Sweetener Dictionary  in International Starch Institute; Science Park Aarhus, Denmark

Chemical Encyclopedia    To the Top

bullet Birds Encyclopedia of Aroma Therapy Essential oil sources by plant name and properties; There is no much chemistry in it but it is the basis to start research in natural products -flavors, medicinal compounds  etc.
bullet Chemistry Encycolpedia part of ScienceDaily Encyclopedia

bullet List of chemistry topics (A-Z) Convenient
bullet The Chemical Elements Clickable Element Symbols of a Period Table

Chemistry -Wikipedia The Chemistry section of the general Encyclopedia

bullet Encyclopedia of Analytical Instrumentation  (see A-Z Index) The Chemistry Hypermedia Project (CHP)
bullet Field Analytic Technologies Encyclopedia (FATE) Technololgies, Links, Training Modules, References
bullet Electrochemistry Encyclopedia -Contents) (or Subject Index)
bullet ENCYCLOPEDIA -Chemistry A very detailed encyclopedia covering all aspects of chemistry; For other subjects see ENCYCLOPEDIA
bullet Environmental Contaminants Encyclopedia Click “Environmental Contaminants Encyclopedia Listing” to go to files (PDF); US National Park Service -Water Resources Division
bullet Measurement Encyclopedia including Analytical Chemistry and related topics

Academic Press

bullet Encyclopedia of Spectroscopy and Spectrometry

bullet Entry Listing by Subject Area
bullet Entry Listing by Alphabet

Wiley InterScience Publications  (Free  -Sample Articles)

bullet Encyclopedia of Analytical Chemistry 8 Free  sample articles (after a simple registration), e.g. Immunochemical Assays in Pesticide Analysis, Infrared Spectroscopy in Clinical and Diagnostic Analysis to add to one’s favourite : Currently: modern techniques in Pesticide, environmental analysis … (PDF files); Free  articles are changed regularly. Encyclopedia of Analytical Chemistry  Contents with 3 parts: Applications , Theory and Instrumentation and General Articles
bullet Encyclopedia of Bioprocess Technology 3 Free articles:

bullet Culture Collections |Optical Sensors (+analytical methods) |Xanthan Gum|
bullet Encyclopedia of Computational Chemistry

bullet Free   Definitions  and Abstract from Subject drop-down menu list
bullet Kirk-Othmer Encyclopedia of Chemical Technology 5 Free  articles including

bullet Aerogels Molecular RecognitionNanotechnologySurface and Interface Analysis
bullet Ullmann’s Encyclopedia of Industrial Chemistry 5 Free  articles:

bullet Articles: Hydrogels, Beer, Anti-inflammatory Drugs, Chemical and Biochemical Sensors, Enzyme and Immunoassays


bullet Encyclopedia of Molecular Cell Biology and Molecular Medicine 29/01/05 Free Sample Articles in Vol. 6-10
Immunoassays (Vol. 6); Insulin Resistance, Diabetes and its complications (Vol. 7); Medicinal Chemistry (Vol. 8); Nematodes (C. elegans), Molecular Biology of (Vol. 9); Plant Gene Expression, Regulation of (Vol. 10)

Chemical Nomenclature, Terminology/Glossary  To the Top

IUPAC Nomenclature and Terminologies

bullet Resources:

bullet Inventory of Definitions in Analytical Chemistry, 2002, IUPAC’s and other bodies’ recommendations; Division of Analytical Chemistry, Federation of European Chemical Societies

IUPAC Recommendations & Reports in Pure Appl. Chem 2004 to prior 1996; full text sorted by division in PDF files

bullet Physical and Biophysical Chemistry
bullet Inorganic Chemistry
bullet Organic and Biomolecular Chemistry
bullet Macromolecular
bullet Analytical Chemistry
bullet Chemistry and the Environment
bullet Chemistry and Human Health
bullet Abbreviated list of Quantities, units and symbols in physical chemistry
bullet ACD/Name Allows one to generate IUPAC  and CAS Index names
bullet Biochemical Nomenclature  IUPAC-IUBMB Joint Commission on Biochemical Nomenclature (JCBN)

bullet Enzyme Nomenclature
bullet Compendium on Analytical Nomenclature (The Orange Book)  19 Chapters (PDF files) including

bullet Alphabetical Index
bullet Fundamental Physico-chemical Terms and Quantities used in Analytical Chemistry
bullet Compendium of Chemical Terminology “The Gold Book”
bullet Compendium of Chemical Terminology, A-Z Main IUPAC site (Searched terms in PDF format)
bullet Glossary for Chemists of terms used in Toxicology IUPAC Commission on Toxicology
bullet Glossary of Terms relating to Pesticides (VI.4) Pure Appl. Chem. 68, pp. 1167-1193, 1996; 36th IUPAC Report on Pesticides
bullet Glosaary of Terms used in Medicinal Chemistry
bullet Glossary of Terms used in Photochemistry (IUPAC Recommendations 1996)
IUPAC Chromatography Terms from Merck Very useful site for studying the definitions and principles of all types  of Chromatography
bullet IUPAC Nomenclature of Organic Chemistry 1993 Recommendations 1979 and Recommendations 1993

bullet Corrections to A Guide to IUPAC Nomenclature of Organic Compounds. Recommendations 1993
bullet Nomenclature and Symbolism for Amino Acids and Peptides Organic & Biochemical Nomenclature IUPAC Symbols & Terminology
bullet Nomenclature of Carbohydrates (Recommendations 1996)  3/07/05
bullet “Recovery” and “apparent recovery” in Analytical Procedures (IUPAC Recommendations 2002) (V.1) Pure Appl. Chem. 74(11), pp. 2201-2205, 2002
bullet Terms relating to low-molar-mass and Polymer Liquid Crystals (PDF file) Pure and Applied Chemistry 73(5), 845­895 (2001)
bullet Risk Assessment Terminology
bullet Terminology for Analytical Capillary Electromigration Techniques (IUPAC Recommendations 2003)
Pure Appl. Chem. 76(2), pp. 443-451, 2004


Terminology and Glossary

bullet Bacterial Names with Standing in Nomenclature
bullet Chemical Safety Information – Glossary Including UN hazard code, hazard pictographs; Oxford University Physical and Theoretical Chemistry Laboratory; Oxford University
bullet Corrosion Glossary a-z
bullet Edible Oils: Glossary of Terms
bullet Everyscience  Chemistry Terminology (A-Z) and General, Inorganic, Organic and Physical Chemistry concepts
bullet Forensic Glossary
bullet General Chemistry Glossary Browse alphabetically or by topic
bullet Glossary of Biotechnology Terms
bullet Glossary of chemical terms from Hach Learning Library 3/07/05
bullet Glossary of Chromatographic Terms for LC; A quick reference page
bullet Glossary of Data Acquisition
Glossary of Liquid-Phase Separation Terms; (LCGC 19(2), 124-162, (2001)
bullet Glossary of IRIS Terms ( IRIS: Integrated Risk Information System)
bullet Glossary of Nuclear Terms; U.S. Nuclear Regulatory Agency
bullet Glossary of MSDS terms from Hach Learning Library 3/07/05
bullet Glossary of Pesticide Chemicals PDF file; US FDA
bullet Glossary of Terms; US ATSDR: Agency for Toxic Substances & Disease Registry
bullet HPLC Glossary
bullet Measurement Uncertainty Glossary; Cooperation on International Traceability in Analytical Chemistry CITAC
bullet MSDS HyperGlossary Terms & Abbreviations for Material Safety Data Sheets (MSDS) (very elaborate)
bullet On-Line Biology Book: GLOSSARY  Terms with associated pictures
bullet Sol-Gel : Glossary
bullet Short Glossary of Chlorine Chemistry
bullet Terms of the Environment, US EPA including abbreviations and acronyms
bullet Water

bullet Encyclopedia of Water Terms; Texas Environmental Center
bullet Wastewater Glossary
bullet Water on the Web Glossary
bullet Water Quality Glossary
bullet Water Science Glossary of Terms
bullet Water Words Dictionary A-Z index with links to PDF files; Nevada Division of Water Planning

Acronyms and Abbreviations      To the Top

bullet Biotechnology Abbreviations and Acronyms
bullet CAS Standard Abbreviations and Acronyms
bullet Chemical Synonyms Database Synonyms of a chemical name and IUPAC chemical name; Environment Canada 18/04/04
bullet Chemical Acronym Database; Indiana University 18/04/04
bullet Dictionary of Chemical Journal Name Abbreviations 13/03/04
bullet List of Cited Journals Abbreviations for the Life Sciences (SWISS-PROT) with Title, ISSN, Publisher and Web site address (not clickable, copy and paste on the URL address box)
bullet Scientific and Technical Acronyms, Symbols and Abbreviations
bullet Terms of the Environment, US EPA including abbreviations and acronyms
bullet Pharma-lexicon Dictionary Abbreviations and Acronyms for over 70,000 biomedical (pharmaceutical, medical & healthcare) -each search result associated with a website link and/or research tittles/abstracts from  PubMed  e.g. HPLC, GC-MS, HIVFDA:

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Biomedical Abbreviations