⚡ A disruption 🪐 A motion change 😟 Mental worry

perturbance

9.4

A small change in the movement of a planet or satellite caused by another body

noun
/pərˈtərbəns/

Specialized

: perturbación

The astronomer noticed a slight perturbance in the planet's orbit due to a nearby asteroid.

Examples

Scientists observed a perturbance in the planet's rotation.
Engineers must account for every perturbance when designing stable satellites.
A sudden perturbance in the system caused the experiment to yield unexpected results.
Did the perturbance affect the star's brightness?
The astronomer noticed a slight perturbance in the planet's orbit due to a nearby asteroid.
Engineers must account for every perturbance when designing stable satellites.
A sudden perturbance in the system caused the experiment to yield unexpected results.

Synonyms

perturbation

vsperturbance

Specialized

4 8.8

A small change that makes a system behave differently

is specific to small motion changes caused by outside forces

variation

vsperturbance

Specialized

1 9.0

A small change in a planet or moon's orbit caused by other bodies

is a small external-force change in motion affecting celestial or physical systems

Antonyms

equilibrium

35 6.8

A state of balance between opposite forces

How Strong

displacement

Specialized

13 5.9

perturbance

Specialized

9.4

deviation

25 5.3

Surface Forms

perturbance singular

perturbances plural

Morphology

perturbance = perturb (semi-transparent) = perturb + ance

Morphologically a nominalization of 'perturb', but the sense is a technical, domain-specific meaning ('small change in motion') that may not be fully predictable for general learners.

Etymology

Perturbance comes from Latin parts per- 'completely' and turbare 'to disturb', the same root as turbulence. In science, a perturbance is a small push or change that disturbs an object's motion, which is why it means a change in a path or orbit.