Although we miss thumbing through a good old dictionary, dog-earred and worn, the next best thing is an online dictionary. There are some great ones to choose from. More than we could put here. So we'll point you to some of our favorites. And we'll keep a lookout for new ones as they come along.

Links

Illustrated Scientific Dictionaries from EnchantedLearning.com (Lower School and Middle School)
http://www.enchantedlearning.com/science/dictionary/
A great illustrated dictionary for younger students.

Glossary of Biochemistry and Molecular Biology by David M. Glick (Advanced) http://db.portlandpress.co.uk/glick/search.htm

Botany.com's Encyclopedia of Common Names of Plants
http://www.botany.com/Common%7E1.html (General)
Packed full with a lot of information for plant lovers.

The Ohio State University Plant Dictionary (General)
http://www.hcs.ohio-state.edu/plants.html
Teaching resources for horticulture.

General Chemistry Online Glossary (General)
http://antoine.fsu.umd.edu/chem/senese/101/glossary.shtml

GeoMan's Glossary of Earth Science Terms (Lower School and Middle School)
http://jersey.uoregon.edu/~mstrick/geology/geo_glossary_page.html
Geoman knows his earth science.

Animal Anatomy Dictionary (General)
http://www.ii.uj.edu.pl/staff/artur/enc/TOCE.htm

MedicineNet.com MedTerms Medical Dictionary (Advanced)
http://www.medicinenet.com/Script/Main/ALPHAIDX.asp?li=MNI&Param=ADICT

Glossary of Terms - Space Science (From JPL, General)
http://inspire.ospi.wednet.edu:8001/curric/space/gloss.html

NASA's Imagine The Universe Dictionary (From GSFC, General)
http://imagine.gsfc.nasa.gov/docs/dictionary.html

Kids Astronomy.com Astronomy and Space Dictionary (Lower School and Middle School)
http://www.kidsastronomy.com/dictionary.htmnter For Education Statistics