Umbilication

n. 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. [ 1913 Webster ]

n. 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. [ 1913 Webster ]