Which prefix is used to indicate a condition that is slower than normal?

The prefix that indicates a condition that is slower than normal is "Brady." This prefix is derived from the Greek word "bradus," meaning slow. It is commonly used in medical terminology to describe conditions related to the heart rate and other bodily functions that occur at a slower-than-normal pace. For instance, "bradycardia" refers to a slower-than-normal heart rate, generally understood as a pulse rate of less than 60 beats per minute.

The other prefixes do not convey the same meaning as "Brady." "Scopy" refers to the process of viewing or examining, often with an instrument. "Hyper" indicates an excessive or increased level, such as in "hypertension," which means high blood pressure. "Pneum" is associated with the lungs or air, used in terms like "pneumonia." Therefore, "Brady" is the only prefix that specifically denotes a condition defined by slowness.