The combining form -tomy used like a suffix has several meanings. In medical terms, it refers to “cutting,” usually in reference to the surgical incision into an organ but sometimes as part of the removal of an object from the body. ... Related to -tomy are the combining forms -tome, -tomous, and tomo-.

Is Tomy a root word?

word-forming element meaning "a cutting" (especially a surgical incision or removal), from Greek -tomia "a cutting of," from tome "a cutting, section" (from PIE root *tem- "to cut").

Is Otomy a suffix?

The suffix '-otomy' is derived from the Greek suffix τόμος, -tómos, "meaning cutting, sharp, or separate".