Technical term in rheology and materials science. Refers to the property of certain gels or fluids that become less viscous when shaken, stirred, or otherwise agitated, and then return to a more viscous state at rest. Compare チキソトロピー, a common loanword synonym.
See also: チキソトロピー
Because this paint has thixotropy, its viscosity decreases when applied with a brush and it sets quickly after application.