Cancer Genomics Glossary
From the Cambridge Healthtech Institute

Dictionary of Genetic Terms
From the Department of Energy Human Genome Program

From Cambridge Healthtech Institute 

From the Public Health Genetics Unit, UK

From the New South Wales Genetics Education Program 

The Genomics Lexicon, 
From the Pharmaceutical Research and Manufacturers of America (PhRMA) 

From the National Human Genome Research Institute

Genetic Alliance Glossary of Key Genetics Terms

Illustrated Glossary from GeneTests/GeneClinics

Spanish "Talking Glossary of Genetics" Launched Online