Which root word means stone?

The root word that means "stone" is lith/o. This term is derived from the Greek word "lithos," which directly translates to "stone." In medical terminology, lith/o is commonly used in various contexts, particularly in conditions involving stones or calcifications in the body, such as lithiasis, which refers to the formation of stones in the body, typically in the kidney or gallbladder.

The other options represent different root words: por/o refers to pores or openings, fibr/o pertains to fibrous tissue, and sarc/o relates to flesh or connective tissue. Each has its specific meaning and usage in medical terms, but when it comes to the definition of "stone," lith/o is the accurate choice. Understanding these root words is essential for deciphering complex medical terms and their implications in the health field.