hysteresis
UK[ˌhɪstəˈriːsɪs]US[ˌhɪstəˈriːsɪs]
n
the phenomenon in which the value of a physical property lags behind changes in the effect causing it, as for instance when magnetic induction lags behind the magnetizing force.
Morpheme Breakdown
hystere
sis
hystere
later, behind
sis
action, process
Etymology
the term 'hysteresis' is a modern scientific coinage, constructed directly from ancient greek components to describe a specific physical phenomenon. it combines 'hysteros', meaning 'later' or 'coming after', with the noun-forming suffix '-sis', which indicates an action or process. the literal construction thus means 'a process of being later' or 'a lagging behind'. this elegantly captures the core behavior observed in systems like magnetism or elasticity, where the effect (e.g., magnetization) does not instantly follow the cause (e.g., the applied magnetic field) but lags, creating a dependency on the history of the system. the word was adopted into english in the late 19th century to provide precise terminology for this lagging effect in physics and engineering.
Analysis
Structure: hystere (later, behind) + sis (action, process)
hystere: from greek 'hysteros', meaning 'later, behind'. sis: from greek '-sis', a suffix forming nouns of action or process.
Examples
magnetic hysteresis is a key consideration in the design of transformers and inductors.
the hysteresis loop on the graph shows the energy loss during a loading and unloading cycle.
economic policies often face a hysteresis effect, where high unemployment persists even after a recession has ended.