The lingering tack or stickiness of a paint film which remains over a long period of time.

The glow in a material after the removal of an external source of fire to which it is exposed, or

The continued flaming combustion of a material after the exposing flame has been removed.

The residue of water in a toilet flush tank after it has been flushed; after flushing, the residue gradually drains

A device that cools compressed air after it is fully compressed.