"BioTech's Biotechnology Dictionary"
Free, searchable online dictionary of biology, chemistry and biotechnology terms
"Chemistry & Environmental Dictionary"
Provides definitions for technical terms and acronyms, and related articles.
"Common Definitions And Terms In Organic Chemistry"
A modest dictionary of about 130 words that are commonly used in undergraduate organic chemistry
"Kiwi Words & Phrases"
Light-hearted look at Kiwi words and phrases and their meanings.
"On-line Medical Dictionary"
OMD is a searchable dictionary