- The definition of botox is an injected botulin neurotoxin muscle relaxer and is sometimes used to treat spasms, tics and wrinkles.
The way many celebrity faces from ten years ago now look much younger is an example of botox.
Origin: bo(tulinum) tox(in) ; from Modern Latin botulinum, species name ; from botulinus, former species name ; from Classical Latin botulus, sausage: see botulism
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botox - Medical Definition