What prefix implies a condition that is 'half'?

The prefix that implies a condition that is 'half' is "hemi-." This prefix is derived from the Greek word "hemi," meaning half. It is commonly used in medical terminology to describe conditions or anatomical features that are characterized by being only a part of the whole structure or function. For example, "hemiplegia" refers to paralysis on one side of the body, indicating that only half of the body is affected.

While the other prefixes have their own meanings—such as "exo-" which means outside, "hypo-" implying a lower or inadequate amount, and "extra-" suggesting beyond or outside of—none convey the concept of 'half.' Understanding this distinction is crucial in deciphering and accurately using medical terminology.