Arthr/o is an example of a: suffix. D combining form. word root. prefix. combining vowel.

## Step 1<br />The term "Arthr/o" is a combining form used in medical terminology. It is derived from the Greek word "arthron", which means joint. In medical terms, "Arthr/o" is used to denote something related to a joint.<br />## Step 2<br />A combining form is a linguistic unit that is used in the formation of compound words. It is a word root with a vowel at the end that can be joined to other word roots, suffixes, or prefixes to form a new word.<br />## Step 3<br />In this case, "Arthr/o" is not a suffix, word root, prefix, or combining vowel. It is a combining form because it is used to form compound words in medical terminology.