Final answer:
The suffix indicating an "incision into" is -tomy. It is used in medical terminology to denote the act of cutting into a part of the body, such as in laparotomy for an incision into the abdomen.
Step-by-step explanation:
The suffix that means "incision into" is -tomy. When we analyze medical terminology, the suffix -tomy is used to denote the act of cutting or making an incision into a part of the body. For example, in the term appendectomy (append- + -ectomy), the suffix -ectomy, which means surgical removal, includes the element -ectom- derived from Greek meaning "cut out," with an additional y to aid pronunciation.
Likewise, the term laparotomy (lapar- + -otomy) has the suffix -otomy, indicating an incision into the abdomen. Here, lapar- refers to the abdomen, and -otomy indicates the incision.