aminopyrine

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A colorless crystalline compound, C₁₃H₁₇N₃O, formerly used to reduce fever and relieve pain, now known to cause agranulocytosis.

from the GNU version of the Collaborative International Dictionary of English.

• noun a white crystalline substance used as an analgesic and antipyretic.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun aminophenazone

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a white crystalline substance used as an analgesic and antipyretic