What term contains a combining vowel between the word root and suffix axillary salpingitis radiotherapy or hepatic?

The term that contains a combining vowel between the word root and suffix is salpingitis.

Here's the breakdown:

* salping/o - word root meaning "fallopian tube"

* -itis - suffix meaning "inflammation"

The combining vowel "i" is used to connect the root and suffix, making the complete word "salpingitis".

Let's look at the other terms:

* axillary - no combining vowel, the "y" acts as a connecting element.

* radiotherapy - no combining vowel, "o" is part of the root "radio".

* hepatic - no combining vowel, "ic" is a suffix meaning "pertaining to".