What part of the word does -ectomy represent?

Suffix
Yes, -ectomy means 'to cut out'; a tonsillectomy is the cutting out of a tonsil or two.
Yes -ectomy is as suffix. Words that include this suffix is like dissectomy...The definition for -ectomy is to cut out.
-ectomy is a medical terminology suffix meaning "surgical removal."
-ectomy is a suffix, meaning surgical removal.