资料来源 : pyDict

脐形涡

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Umbilication \Um*bil"i*ca"tion\, 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.