hysteres-, hystere-

(Greek: shortcoming, deficiency; to be behind, to come late, to lag; later)

This hesteres unit of words is not related to a similarly spelled hystero- unit of words referring to the "womb" or "uterus"; and hysteria.

1. A delayed response by an object to changes in the forces acting on it; especially, magnetic forces.
2. The lagging of an effect behind its cause, as when the change in magnetism of a body lags behind changes in the magnetic field.
3. A condition in which the state of a system depends on its previous history, generally the retardation or lagging of an effect behind the cause of the effect.

Specifically, the inclination of a magnetic material to saturate and retain some of its magnetism after the alternating magnetic field to which it is subjected reverses polarity.

4. A time lag in the occurrence of two associated phenomena; such as, between cause and effect.

In cardiac pacing terminology, the number of pulses per minute below the programmed pacing rate that the heart must drop in order to cause initiation of pacing; it can be programmed in by a pulse generator.

5. The failure of the manifestation of an effect to keep up with its cause.
6. Etymology: origin from the late 19th century, from Greek husteresis (now hysteresis), "shortcoming, deficiency"; from husterein, "to be behind", from husteros, "late".
hysteresis clutch
A clutch that produces torque by magnetic hysteresis.
hysteresis coefficient
The constant of proportionality in a formula for hysteresis loss.
hysteresis coupling
An electric coupling in which torque is transmitted by hysteresis; that is, forces from the resistance of magnetic fields within a ferromagnetic material.
hysteresis cycle
A cycle of variation in the magnetic field used for magnetic induction.

The field is periodically reversed until the magnetic induction is a function only of the strength of the field and of its rate of change.

hysteresis error
The maximum difference between the upscale-going and downscale-going values of the driven variable, at a common driving variable in a hysteresis loop.
hysteresis loss
1. An energy loss in magnetic material due to an alternating magnetic field; such as, elementary magnets within the material align themselves with the reversing magnetic field.
2. The loss of energy by conversion to heat in a system exhibiting hysteresis.

Hysteresis loss in a magnetic circuit is the energy expended to magnetize and demagnetize the core.

hysteresis motor
A small synchronous motor; such as, a phonograph motor, for light-duty, constant-speed applications.

It uses hysteresis and eddy-current losses induced in its hardened-steel rotor to produce rotor torque.

A reference to a delay in the production of an effect by a cause.
hysteretic damping
The dissipation of energy in a vibrating mechanical system or solid because of mechanical hysteresis.
A figure by which the ordinary course of thought is inverted in expression, and the last is put first.
hysteron proteron
A figure of speech that reverses the natural order of words or clauses.

An example: "Is your father well?" Is he yet alive?"

2. A figure of speech in which what should follow comes first; or an inversion of the natural or logical order.
3. That form of fallacy in which someone asserts a consequent and then infers the antecedent.
piezoelectric hysteresis
The hysteretic behavior of a piezoelectric crystal in which the electric polarization depends on the stress history as well as on the mechanical stress applied to the crystal.