Geological Glossaries:

http://www.geology.iastate.edu/new_100/glossary.html

http://www.geotech.org/survey/geotech/dictiona.html

http://www.geologylink.com/glossary/

Paleontology Glossaries:

http://www.ucmp.berkeley.edu/glossary/glossary.html

http://www.enchantedlearning.com/subjects/dinosaurs/glossary/

http://www.geo.arizona.edu/geo3xx/308/glossary.html

http://geology.er.usgs.gov/paleo/glossary.shtml