Medical Terms are based on Latin Origin, Greek Origin, Eponym (a word based on a person’s name), Acronym (shortened terms of long words), and Homonym (words that sound the same but differ in meaning)
When a suffix or another root beginning with a consonant is added to a root, a vowel is inserted between the root and the next word part to aid in pronunciation
Combining vowel is usually an o, but may occasionally be a, e, or i