What does the prefix "hemi-" signify?

The prefix "hemi-" signifies "half." It is derived from the Greek word "hemi," which means half or partial. This prefix is commonly used in various medical terms to describe conditions or structures that are related to half of something. For instance, "hemisphere" refers to half of a sphere, often used in the context of the brain, where there are two hemispheres – the right and the left. Similarly, "hemiplegia" refers to paralysis affecting one half of the body. Understanding this prefix is crucial as it helps in grasping the meanings of complex medical terminology, particularly in anatomy and physiology.