word "plastic" in "plastic surgery" doesn't imply the
use of the material that we call plastic. "Plastic" comes
from the Greek work transliterated "plastikos," which means to mold or to
form. The plastic cup in your cupboard got its name from the same
root: the material called plastic can be molded or formed. So the
"plastic" in "plastic surgery" doesn't mean that a
plastic material is used; it means that we are trying to change
something's shape or form.