Chemistry

The scientific discipline that studies chemical substances, compounds, and molecules composed of atoms of various chemical elements, as well as their compositions, structures, properties, behaviors, and the changes they undergo during reactions with other substances.

Links

Wikipedia: Glossary of chemistry terms
General Chemistry Online!
Chemical Forums
Isomer Design - includes visual index of psychedelic substances
ChemHacktica - a number of computational tools to assist in synthetic planning and other aspects of organic chemistry
ControlledMold - fermentation tech

Cooking

Grimgrains
The Black Butter Club - seeds, microbes, culture, history, & tasty things
Save Food From The Fridge
The Metric Kitchen
The Sad Bastard Cookbook

Mineralogy

British & Exotic Mineralology
American Mineralogist Crystal Structure Database

Lexicon

alloy: a mixture of metals/a metal and another element which in combination exhibit a metallic bonding character
frigorific: causing, producing, generating, chilling cold