hysteresis

American  

[his-tuh-ree-sis] / ˌhɪs təˈri sɪs /

noun

Physics.

1. the lag in response exhibited by a body in reacting to changes in the forces, especially magnetic forces, affecting it.

2. the phenomenon exhibited by a system, often a ferromagnetic or imperfectly elastic material, in which the reaction of the system to changes is dependent upon its past reactions to change.

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hysteresis British  

/ ˌhɪstəˈrɛtɪk, ˌhɪstəˈriːsɪs /

noun

1. physics the lag in a variable property of a system with respect to the effect producing it as this effect varies, esp the phenomenon in which the magnetic flux density of a ferromagnetic material lags behind the changing external magnetic field strength

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hysteresis Scientific  

/ hĭs′tə-rē′sĭs /

1. The dependence of the state of a system on the history of its state. For example, the magnetization of a material such as iron depends not only on the magnetic field it is exposed to but on previous exposures to magnetic fields. This “memory” of previous exposure to magnetism is the working principle in audio tape and hard disk devices. Deformations in the shape of substances that last after the deforming force has been removed, as well as phenomena such as supercooling, are examples of hysteresis.

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Other Word Forms

• hysteresial adjective
• hysteretic adjective
• hysteretically adverb

Etymology

Origin of hysteresis

1795–1805; < Greek hystérēsis deficiency, state of being behind or late, hence inferior, equivalent to hysterē-, variant stem of hystereîn to come late, lag behind, verbal derivative of hýsteros coming behind + -sis -sis

Example Sentences

Economists call this “hysteresis”, where joblessness begets more of it.

From BBC

This phenomenon, known as adhesion hysteresis, can be fundamentally observed in soft, elastic materials: Adhesive contact is formed more easily than it is broken.

From Science Daily

That hysteresis effect buys us a little bit of a margin of error but not a big one.

From Scientific American

"But inflation lags the economic cycle. The risk is that hysteresis forces in the inflation cycle keep central banks on a war path for too long, causing policy overshooting."

From Reuters

I have been a strong proponent of ideas such as secular stagnation and hysteresis that warn of the long-run consequences of insufficient demand.

From Washington Post