Final answer:
An abnormal nail in shape or form is called dystrophic nail.
Step-by-step explanation:
An abnormal nail in shape or form is called dystrophic nail. It refers to a nail that deviates from its normal appearance and may be caused by various factors, such as trauma, infection, or underlying medical conditions.
"Dystrophic nails" refer to a condition where the nails, which are the hard coverings at the end of the fingers and toes, become abnormal in structure and appearance. Dystrophic changes in the nails can be caused by various underlying conditions, affecting the growth and health of the nails. These changes can manifest as deformities, discoloration, and brittleness.