The word anomaly derives from the Greek ἀνωμαλία, meaning unevenness or irregularity. A structural anomaly is a formation deviating from the typical structure or a structural defect (example in Fig. 1).
The atypical formation or irregularity can concern the
of grains and phases.
Additional references:
Inoculant inclusions
Inverse chill
Segregation factor
hard inclusions
Hard spots
Iron needles
Cold drops
Oxide inclusion
Gas porosity