Does the medical terminology combining form -otomy mean cutting into or surgical incision?

You are absolutely correct! The combining form -otomy in medical terminology means cutting into or surgical incision.

Here are some examples:

* Tracheotomy: An incision into the trachea (windpipe)

* Appendectomy: Surgical removal of the appendix (which involves cutting it out)

* Craniotomy: An incision into the skull

* Phlebotomy: Incision into a vein (bloodletting)

Let me know if you have any other medical terminology questions!