hot melt
Manufacturing Technology
noun
A hot and molten form of a substance which is usually solid at room temperature; (in later use also) an adhesive, coating, etc. which is applied in a heated molten state and which sets as it cools.
adjective
Solid at normal temperatures but capable of being melted for application, e.g. as a coating.
Origin
Early 20th century; earliest use found in U.S. Patents.