Irina Glozman (asker) Jan 30, 2009:

clarification Freebase or free base refers to the standalone neutral, basic form of an amine, as opposed to its water-soluble salt form. The amine is usually an alkaloid natural product. Free base is commonly used in chemistry and pharmaceuticals to describe the unprotonated amine form of a compound. The adverb freebase and the verb freebasing are usually restricted to recreational drug-related contexts.