Question

which term shows the correct use of the combining vowel?
rhinodynia
rhindynia

Explanation:

In medical terminology, a combining vowel (usually "o" or "i") is used to connect a word root and a suffix (or another word part) when the suffix starts with a consonant. The word root for "nose" is "rhin-", and the suffix for "pain" is "-dynia". To connect "rhin-" (word root) and "-dynia" (suffix, starting with "d", a consonant), we use the combining vowel "o", resulting in "rhinodynia". "rhindynia" is incorrect as it does not use the combining vowel properly between the word root and the suffix.

Answer:

A. rhinodynia