micromotion
Imperceptible slight shift
Micromotion refers to extremely small movements, often imperceptible to the naked eye.
In engineering and medicine, it describes tiny displacements between surfaces—such as the subtle shifting of a dental implant against bone, which can affect healing.
In ergonomics and time-motion studies, micromotion analysis breaks down work tasks into their smallest component movements to improve efficiency.
The term also appears in animation and robotics, where micromotions create lifelike subtlety: The animator added micromotions to the character's face.
Momentary involuntary face signal
- twitchInvoluntary muscular jerk
- flickerUnsteady, brief light
- glanceBrief, casual look
- blinkRapid lid movement
flinch · nod · tell · cue · signal · involuntary · subtle · unconscious
Cannot be sensed
- faintWeak and indistinct
- slightMinor or thin
- tremorInvoluntary rhythmic shaking
- quiverTrembling or arrow case
flicker · twitch · drift · sway · vibration · oscillation · minute · tiny
Metric unit, billion-fold smaller
- calibrationAdjusting for measurement accuracy
- toleranceWillingness to accept difference
- measurementDetermining size or amount
- accuracyDegree of correctness
resolution · sensitivity · instrumentation · displacement · actuator · piezoelectric · MEMS · microsensor
microexpression
Momentary involuntary face signal
blink · flinch · nod · tell · cue · signal · involuntary · subtle · unconscious · facial
imperceptible
Cannot be sensed
quiver · flicker · twitch · drift · sway · vibration · oscillation · minute · tiny · barely
nanometer
Metric unit, billion-fold smaller
- calibrationAdjusting for measurement accuracy
- toleranceWillingness to accept difference
- measurementDetermining size or amount
accuracy · resolution · sensitivity · instrumentation · displacement · actuator · piezoelectric · MEMS · microsensor · positioning
joint
Shared by multiple parties
tremor · fidget · shift · twitch · vibration · oscillation · drift · creep · displacement · implant