1. Pertaining to the navel; as umbilical vessels; umbilical region.
2. Umbilical points, in mathematics, the same as foci.
3. Umbilical vessels, in vegetables, are the small vessels which pass from the heart of the seed into the side seed-lobes, and are supposed to imbibe the saccharine, farinaceous or oily matter which is to support the new vegetable in its germination and infant growth.