Irregularity (noun)

1. The state of being irregular or not conforming to a standard or rule.
2. A deviation from what is normal or expected.
3. A lack of uniformity, symmetry or consistency.

Origin:

The word 'irregularity' originated from the latin word 'irregularitas' meaning 'unfairness' or 'unjustness'.

Examples:

1. The irregularity in the shape of the object was a cause for concern.
2. The irregularity in the financial records led to an investigation.
3. The irregularity in the heartbeat was detected by the doctor.
4. The irregularity in the pattern was corrected after careful analysis.
5. The irregularity in the measurement was due to a technical error.