How would you characterize a noticeably thin, white nail plate that is more flexible than usual?

The characterization of a noticeably thin, white nail plate that exhibits increased flexibility corresponds to the condition known as eggshell nails. This condition is typically characterized by a nail plate that is softer and more fragile than a normal nail, often leading to a tendency for the nails to bend or break more easily. The term "eggshell" reflects the delicate and thin nature of the nail structure, which resembles the fragility of an eggshell.

In contrast, peeling nails refer to a condition where the nails may flake or separate in layers, which does not specifically describe the thinness and flexibility associated with eggshell nails. Brittle nails typically indicate nails that break or chip more easily due to their hardness and lack of moisture, which is opposite to the flexibility noted in eggshell nails. Thickened nails suggest an increase in nail thickness, which would not align with the thin appearance described in the question. Thus, the defining characteristics of the thin, white, and flexible nail plate accurately align with the description of eggshell nails.