(redirected from free-base)
Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.




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 ?
The authors of Cocaine Changes present data from 53 users for whom cocaine (free-base) smoking has been their primary mode of consumption for an important part of their peak period of cocaine consumption.
The authors open their discussion on the learning of the free-base "highs" with a solid sociocentric view:
Not including the free-bases for Barry Bonds that are almost guaranteed, Ortiz could walk a few too many here, something which could spell big innings for the Giants and big trouble for Anaheim.