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v. free·based, free·basing, free·bases
1. To purify (cocaine) by treating its powdered hydrochloride form with an alkaloid solution such as ammonia and then using a heated solvent to separate out the precipitate.
2. To use (cocaine purified in this way) by smoking it or by inhaling the fumes after burning it.
To prepare or use cocaine purified in this way.
Cocaine purified by this method.

free′bas′er n.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
References in periodicals archive ?
These corpora consist of 100,000 sentences and 59,576 pairs of relational named entities, and "mid," which is a unique string of Freebase entity attached within a corpus because of Google's Freebase as a knowledge base.
As depicted in Figure 5, Freebase graphs use blue balls to represent graph nodes and arrows connecting balls are relations (properties) between those nodes.
Google, based in Mountain View, Calif., said in a blog post that it would maintain Freebase "as a free and open database for the world." It said it planned to use the company's technology to improve its search results.
Cocaine comes in two chemical forms: hydrochloride salts (the powdered form) and "crack" (a smokable "freebase" form produced through a reaction with an alkaline substance such as baking soda).
Contrary to VQS applications, Freebase Parallax [Hildebrand et al 2006], the winner of Semantic Web challenge 2006, is based on the idea of faceted search.
Cocaine hydrochloride melts at 195[degrees]C and decomposes with heat while the freebase alkaloid is insoluble in water, melts at 98[degrees]C and vaporises at higher temperatures--therefore it can be smoked.
Base, freebase, gravel, rock, stones, wash ( whatever it's called, one thing remains the same: Crack cocaine is a deadly drug with potentially catastrophic consequences for crime levels in Newcastle.
(1,2,10) In one study, 6 volunteers in an 8 x 8 x 7-ft enclosed room were exposed to 200 mg freebase cocaine vapor; none of their urine samples exceeded the federal GC-MS threshold.
"The pH of pipe tobacco is 8, which means that half of the nicotine is in a freebase form.
During the early 1980s, some cocaine users (especially drug dealers) started to smoke freebase, a costly and challenging process involving mixing powder cocaine with ether over an open flame (Hamid, 1992).
*** Ever tried any form of cocaine (eg, powder, "crack," and "freebase").