What is a medical term for word with two or more root words?

There isn't a single, universally accepted medical term for a word with two or more root words. However, here are some terms that could be used to describe such a word:

* Compound word: This is a general term used in linguistics to describe words formed by combining two or more words.

* Polymorphemic word: This term emphasizes the multiple morphemes (meaningful units) that make up the word, including root words and affixes.

* Complex word: This term simply implies that the word is composed of multiple parts.

Example:

The word "cardiomyopathy" is a compound word, a polymorphemic word, and a complex word because it's formed from the root words "cardio" (heart) and "myo" (muscle) and the suffix "-pathy" (disease).

Ultimately, the most appropriate term would depend on the specific context and the emphasis you want to convey.