noun Pharmacology.
a synthetic narcotic analgesic, C 1 9 H 2 7 NO, used chiefly for the relief of moderate to severe pain.

1960–65; penta- + (benz)azocine, a component of its chemical name Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
pentazocine (pɛnˈtæzəʊˌsiːn)
a powerful synthetic drug used in medical practice as a narcotic analgesic

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

pentazocine pen·taz·o·cine (pěn-tāz'ə-sēn')
A synthetic narcotic drug used as a nonaddictive analgesic, often in place of morphine.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Pilot data indicates that pentazocine decreases manic symptoms in hospitalized individuals.
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