Which term describes a condition with rapid onset?

The term that describes a condition with rapid onset is "acute." In medical terminology, an acute condition refers to a disease or illness that appears suddenly and typically has a short duration. Acute conditions can be severe and may require immediate medical attention. Examples include a heart attack, an asthma attack, or a sprained ankle, all of which develop quickly and may present with intense symptoms that require prompt treatment.

In contrast, chronic conditions are long-lasting and often develop slowly over time. Progressive conditions are those that worsen over time, while residual relates to the lasting effects after the acute phase of an illness has resolved. Understanding the distinction between these terms is essential for effective patient assessment and treatment planning.