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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 ?
London, Aug 10 ( ANI ): Web giant Google has launched a new search feature in the UK, which would help answer people's queries beyond providing a series of blue links.hile addressing a press conference in San Fransico, Google's search chief, Amit Singhal announced the extension of the Google Knowledge Graph in the UK and every other English speaking country.
Websites with events now have more tools for getting booking information into the Google Knowledge Graph, including official tickets links, delegated event listings, comedian events, and venue events.
Video game information has been added to Google Knowledge Graph results.
That happened in November 2013, as shown in the Wikipedia page history, and yet the error persists 6 months later in both the Bing Snapshot and the Google Knowledge Graph entries, even after presentations to groups that included Google employees.
The Google Knowledge Graph results are expanding to more international versions, and Google recently announced better Knowledge Graph support for Polish, Turkish, and Chinese.
Nathan Safran reported in June 2012 that "1 Out of 5 Google Knowledge Graph Entries for Trending Keywords Are Outdated" (