👉 The term "retentive" is used in the context of materials, particularly in the field of engineering and manufacturing. It refers to a property that allows a material to retain or hold onto its original state when subjected to certain conditions such as temperature or pressure changes. In other words, it describes a property that makes a material resistant to physical change under certain conditions. This could include the ability to withstand high temperatures or pressures without losing its original shape and size, which is crucial for applications where materials