SkillsUSA Medical Terminology Practice Test

What root corresponds to 'radius'?

Oste/o Rad/i Radi/o Rheumat/o

Correct Answer:

Rad/i

Explanation:

Focus on the bone named radius. The linking root for that specific bone is rad/i-. You can see this in how radius becomes radii in its plural, showing the root rad/i- stands for the radius bone. The other roots point to different ideas: oste/o is about bone in general, radi/o relates to rays or X‑rays, and rheumat/o deals with rheumatic diseases. So the root that corresponds to radius is rad/i-.

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