The "Plastic Limit" is a term used in soil mechanics to describe the moisture content at which soil transitions from a plastic state to a semi-solid state. At this point, the soil can no longer be easily molded or shaped without cracking. This limit is crucial for understanding the workability of clay soils in construction and engineering projects. Determining the Plastic Limit involves rolling a soil sample into a thread until it crumbles at a specific diameter, usually around 3 mm. This measurement, along with the Liquid Limit, helps classify soil behavior and is essential for assessing soil stability and suitability for various applications.