from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Chemically purified, very potent cocaine in pellet form that is smoked through a glass pipe and is considered highly and rapidly addictive.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A mixture of baking soda and cocaine in solid form that is smoked in a pipe as a narcotic.
- n. A mixture of salt substitute, ether, and cocaine in a semi-liquid form, which is far more potent than if made with baking soda alone.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a purified and potent form of cocaine that is smoked rather than snorted; highly addictive
From its preparation by breaking cocaine crystals into pellets.(American Heritage® Dictionary of the English Language, Fourth Edition)
So named due to the break up (crack, cracking) of crystals of cocaine during its manufacture. (Wiktionary)