enucleation(n = noun.act) - surgical removal of something without cutting into it; "the enucleation of the tumor"
is a kind of operation, surgery, surgical operation, surgical procedure, surgical process
Derived form verb enucleate₂

   The act of enucleating; elucidation; exposition. [1913 Webster]
"Neither sir, nor water, nor food, seem directly to contribute anything to the enucleation of this disease." [1913 Webster]