succinylcholine

[sŭk′sə-nĭl-kōlēn′]
n.
  1. A crystalline compound formed by esterification of succinic acid with choline and used medically to produce brief but complete muscular relaxation during surgical anesthesia.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.