Biology	Health & Medicine
Chemistry	Mathematics & Computing
Earth Sciences	Physics & Astronomy
Engineering	Resource Grab Bag

Biology

• Life Science Dictionary
  http://biotech.icmb.utexas.edu/search/dict-search.html
  A dictionary set up by BioTech, an educational resource and research tool on the World Wide Web.
• Glossary of Genetic Terms
  http://www.genome.gov/glossary.cfm
  The National Human Genome Research Institute's Talking Glossary of Genetic Terms.
• Animal Diversity Web
  http://animaldiversity.ummz.umich.edu/index.html
  Search through this database of diversity, presented by the Univ. of Michigan Museum of Zoology.
• Environmental Education’s Endangered Species Site
  http://www.nceet.snre.umich.edu/EndSpp/Endangered.html
  A searchable listing of endangered species, which also can be searched by region.

• Chemicool
  http://www-tech.mit.edu/Chemicool/
  The clickable periodic table with information on all the elements.
• Recommendations on Organic & Biochemical Nomenclature, Symbols & Terminology, etc.
  http://www.chem.qmul.ac.uk/iupac/
  From IUPAC, an exhaustive resource of links. (On most of the individual resource pages, entries are located below attributions, so scroll down.)
• Library of Toxins
  http://www.epa.gov/enviro/html/emci/chemref/index.html
  A dictionary with descriptions of toxic substances.

 
Earth Sciences

• geologylink
  http://www.geologylink.com
  Geology site packed with information, including a glossary.
• National Oceanographic and Atmospheric Administration
  http://www.noaa.gov/
  Home page of the NOAA.
• Geosciences Glossary
  http://stommel.tamu.edu/~baum/paleo/ocean/ocean.html
  Glossary of oceanography and the related geosciences with references.

 
Engineering

• Environmental Engineering Glossary
  http://civil.engr.siu.edu/ray/glossary.htm
  Glossary of environmental engineering terms from Southern Illinois Univ.
• Civil & Structural Engineering Resource Web
  http://sunflower.singnet.com.sg/~icyh1955/civil.html
  Engineering links from Singapore.

 
Health & Medicine

• National Institutes of Health
  http://www.nih.gov/
  Home page of the NIH, including the NIH Information Index.
• RxList
  http://www.rxlist.com/
  Searchable index of pharmaceuticals.
• OncoLink
  http://www.oncolink.upenn.edu/
  The University of Pennsylvania Cancer Center Resource.
• AIDS Medical Glossary
  http://www.critpath.org/research/gmhgloss.htm
  A glossary of HIV/AIDS-related terms.
• Virology Glossary
  http://www.virology.net/ATVGlossary.html
  From "All the Virology on the Web"
• National Cancer Institute
  http://www.nci.nih.gov/
  Home page of the National Cancer Institute.
• Medscape
  http://www.medscape.com/
  A searchable database of published medical research.
• Healthfinder
  http://www.healthfinder.gov/
  Consumer health and human services information web site.

 
Mathematics & Computing

• Dictionary of Algorithms and Data Structures
  http://www.nist.gov/dads/
  Dictionary from the National Institute of Standards and Technology.
• Mathematical Terms
  http://www.cut-the-knot.org/glossary/atop.shtml
  A glossary for math-phobics and -philes alike.

 
Physics & Astronomy

• Fundamental Physical Constants
  http://physics.nist.gov/cuu/Constants/index.html
  Fundamental Physical Constants from the NIST.
• The Particle Detector BriefBook
  http://rkb.home.cern.ch/rkb/titleD.html
  Handbook hosted by CERN serving as both an introduction for newcomers and a reference for working physicists.
• Glossary of Astronomy
  http://nedwww.ipac.caltech.edu/level5/Glossary/Glossary_index.html
  A glossary of the terminology of astronomy.
• Remote Sensing
  http://mercator.upc.es/nicktutorial/Glossary/glossary.html
  A glossary of remote sensing terms.

 
Resource Grab Bag

• The WWW Acronym and Abbreviation Server
  http://www.ucc.ie/info/net/acronyms/acro.html
  The lexicon for common acronyms and abbreviations.
• Reference Sources
  http://www.umanitoba.ca/libraries/units/engineering/ref.html
  A reference site loaded with links to science and technology sites.
• Frontiers in Science
  http://www.bioscience.org/urllists/units.htm
  A conversion chart of weights and measures.
• PsychNET
  http://www.apa.org/psychnet/
  Informational site sponsored by the American Psychological Association.
• Map Machine
  http://www.nationalgeographic.com/resources/ngo/maps/
  National Geographic's "Map Machine" offers all kinds of maps, plus facts and profiles of countries and U.S. states.
• GIS Dictionary
  http://www.geo.ed.ac.uk/agidict/welcome.html
  A glossary of terms posted by the Association for Geographic Information in Britain.
• epicurious Eating Dictionary
  http://www.epicurious.com/db/dictionary/terms/indexes/dictionary.html
  A dictionary of food, its preparation and consumption.
• WWW Virtual Library of Agriculture
  http://ipmwww.ncsu.edu/cernag/cern.html
  A comprehensive web server on agriculture from North Carolina State University.
• the Official Statistics – Abstract
  http://www.census.gov/stat_abstract/
  From the U.S. Census Bureau, here are statistical facts about the US, dubbed "Uncle Sam's Bookshelf."
• the Official Statistics – Index
  http://quickfacts.census.gov/qfd/index.html
  A clickable map with information on all the states.