1. An unusual or irregular development of body structures or tissues that deviates from the normal pattern
The doctor discovered an abnormal formation in the patient's chest X-ray.
O médico descobriu uma formação anormal na radiografia do tórax do paciente.
2. In medicine and biology, the development of structures that differ from typical anatomical patterns
Abnormal formation of the fetus can be detected through prenatal screening.
A formação anormal do feto pode ser detectada através de testes pré-natais.
3. In geology, unusual structural arrangements of rock or mineral deposits
Geologists studied the abnormal formation of crystals in the cave.
Os geólogos estudaram a formação anormal de cristais na caverna.