fixative >> ˈfɪksətɪv
Definition: [noun] a chemical substance used to preserve or stabilize biological material prior to microscopy or other examination.
Example: an alcoholic fixative
Definition: [noun] a substance used to keep things in position or stick them together.
Example: the swift glues these thin twigs to a wall using its own saliva as a fixative
Definition: [adjective] (of a substance) used to fix or stabilize something.