Fatigue

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Fatigue </dt>
1. A weakening or deterioration of metal or other material occurring under load, especially under repeated cyclic, or continued loading. </dd>
'Self-explanatory compounds include: fatigue crack, fatigue failure, fatigue load, fatigue resistance, fatigue test. </dd>
2. State of the human organism after exposure to any type of physical or psychological stress (e.g., pilot fatigue). </dd>

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use