What does thixotrope mean?
A thixotrope is a substance whose internal structure breaks down gradually when stress is applied, causing it to flow more readily. This behavior is common in some paints, inks, gels, pastes, and ceramic materials. After the stress is removed, the material's structure begins to rebuild and its viscosity can increase again. The term is related to thixotropy, which names the time-dependent process, and thixotropic, which describes a substance exhibiting it. Thixotropy is especially useful in products that must spread easily during application but retain their body afterward. It should not be confused with simple non-Newtonian flow: the defining feature of thixotropy is that viscosity changes over time as the material's structure is disrupted and then recovers. The word belongs primarily to technical and industrial vocabulary rather than everyday speech.
nounA substance, especially a fluid, gel, or paste, whose internal structure breaks down under applied stress, allowing it to flow more readily. When the stress is removed, the structure gradually rebuilds.
- A substance, especially a fluid, gel, or paste, that undergoes time-dependent structural breakdown under stress and gradual recovery when the stress is removed.
"The coating is a thixotrope, thinning under the brush and gradually regaining body when left undisturbed."
"The ink is a thixotrope: it spreads readily when brushed but thickens again after the shear is removed."
"A thixotrope can be engineered to remain fluid while being sprayed and regain viscosity once it reaches its target."
The plural is grammatically standard but rarely needed outside technical writing.
"Several paint thixotropes were compared for their recovery rates after application."
Give some paint a vigorous stir and it may flow more freely; leave it alone, and its body gradually returns.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does thixotrope come from?
Thixotrope was formed in English from Greek-derived elements associated with touch and turning. The name combines thixis, meaning a touching or contact, with trope, meaning a turning, reflecting the way a thixotropic material changes under mechanical stress. Its more familiar relatives include the noun thixotropy and the adjective thixotropic, while words such as tropism and tropic come from the same Greek turning element.
Related word forms
How thixotrope is actually used
This is a technical term used chiefly in rheology, coatings, ceramics, inks, and chemical formulations. It is uncommon in general prose.
Easily confused with thixotrope
Thixotrope is the noun naming a substance with this behavior, whereas thixotropy is the noun naming the behavior itself.
Thixotropic is the adjective describing a substance or material that exhibits thixotropy.