Etymology
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Botox

a commercial name for botulinum toxin, and composed of elements from those words, approved in U.S. as a temporary cosmetic injection in 2002.

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Definitions of Botox

Botox (n.)
a neurotoxin (trade name Botox) that is used clinically in small quantities to treat strabismus and facial spasms and other neurological disorders characterized by abnormal muscle contractions; is also used by cosmetic surgeons to smooth frown lines temporarily;
Synonyms: botulinum toxin A
From wordnet.princeton.edu