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An amputator is a person who amputates, or something which causes amputation.
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Most artificial limbs need to be specially fitted to a person. They are not available for purchase in a regular store. See a doctor if one has questions about artificial limbs.
An amputee is a person who has had one or more of their limbs removed.
An amputee is a person who has had one or more of their limbs removed.
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The name of a vertebrate with four limbs is a tetrapod (tetra meaning four and pod meaning foot).
Lower limbs or left and right.