Which of the following terms indicates a relationship to the ear?

The term that indicates a relationship to the ear is "aur/o." This prefix or combining form is derived from the Latin word "auris," meaning ear. It is frequently used in medical terminology related to ear anatomy, conditions, and functions. For example, terms such as "auricle" refer to the outer ear structure, and "aural" pertains to anything related to hearing or the ear.

The other terms have different meanings unrelated to the ear. "Axill/o" pertains to the armpit or axilla, "bacteri/o" relates to bacteria, and "azot/o" is associated with nitrogen or nitrogenous compounds in the body. Understanding these root words helps clarify their specific contexts in medical terminology.