D defs.my
Entry 1 sense Webster, 1913

Umbilication

· Um·bil·i·ca·tion · IPA
01 n. A slight, navel-like depression, or dimpling, of the center of a rounded body; as, the umbilication of a smallpox vesicle; also, the condit…
  1. 1.
    A slight, navel-like depression, or dimpling, of the center of a rounded body; as, the umbilication of a smallpox vesicle; also, the condition of being umbilicated.