Answer :
The combining form that means straight is "orth/o."
1. "Orth/o" is derived from the Greek word "orthos," which means straight or correct.
2. This combining form is commonly used in medical terminology to indicate straightness or correctness.
3. For example, "orthodontics" is a branch of dentistry that focuses on correcting irregularities of the teeth to achieve straight alignment.
4. Therefore, when you see the combining form "orth/o" in a medical term, it typically relates to something being straight or correct.
