botulinum toxin

World English Dictionary
botulinum toxin (ˌbɒtjʊˈlaɪnəm)
 
n
See Botox a pharmaceutical formulation of botulin used in minute doses to treat various forms of muscle spasm and for the cosmetic removal of wrinkles

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American Heritage
Science Dictionary
botulinum toxin   (bŏch'ə-lī'nəm)  Pronunciation Key 
Any of several enzymes produced by the bacterium Clostridium botulinum that are extremely potent neurotoxins. Botulinum toxin interferes with the ability of neurons to release acetylcholine at nerve-muscle junctures, thereby inducing the paralysis of botulism. Botulinum toxin is resistant to enzymatic digestion in the body and is used as an antispasmodic and a treatment for wrinkles by paralyzing facial muscles. Also called botulin.
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