diacetylmorphine

di·a·ce·tyl·mor·phine

[dahy-uh-seet-l-mawr-feen, -set-, dahy-as-i-tl-]
noun Pharmacology.

Origin:
1870–75; diacetyl + morphine

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
diacetylmorphine (daɪˌæsətɪlˈmɔːfiːn) [Click for IPA pronunciation guide]
 
n
another name for heroin

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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00:10
Diacetylmorphine has a plethora of syllables.
So is sesquipedalianism. Does it mean:
given to using long words.
an obscure term ostensibly referring to a lung disease caused by silica dust, sometimes cited as one of the longest words in the English language.
American Heritage
Medical Dictionary

diacetylmorphine di·a·ce·tyl·mor·phine (dī'ə-sēt'l-môr'fēn', dī-ās'ĭ-tl-)
n.
See heroin.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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