a. [ Cf. F. ombilical. See Umbilic, n. ] 1. (Anat.) Of or pertaining to an umbilicus, or umbilical cord; umbilic. [ 1913 Webster ]
2. Pertaining to the center; central. [ R. ] DeFoe. [ 1913 Webster ]
Umbilical cord. (a) (Anat.) The cord which connects the fetus with the placenta, and contains the arteries and the vein through which blood circulates between the fetus and the placenta; the navel-string.(b) (Bot.) The little stem by which the seeds are attached to the placenta; -- called also funicular cord. -- Umbilical hernia (Med.), hernia of the bowels at the umbilicus. -- Umbilical point (Geom.), an umbilicus. See Umbilicus, 5. -- Umbilical region (Anat.), the middle region of the abdomen, bounded above by the epigastric region, below by the hypogastric region, and on the sides by the lumbar regions. -- Umbilical vesicle (Anat.), a saccular appendage of the developing embryo, containing the nutritive and unsegmented part of the ovum; the yolk sac. See Illust. in Appendix. [ 1913 Webster ]
{ } a. [ L. umbilicatus. See Umbilic. ] (a) Depressed in the middle, like a navel, as a flower, fruit, or leaf; navel-shaped; having an umbilicus; as, an umbilicated smallpox vesicle. (b) (Bot.) Supported by a stalk at the central point. [ 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 ]
‖n. [ L. See Umbilic. ] 1. (Anat.) The depression, or mark, in the median line of the abdomen, which indicates the point where the umbilical cord separated from the fetus; the navel; the belly button, in humans. [ 1913 Webster ]
2. (Gr. & Rom. Antiq.) An ornamented or painted ball or boss fastened at each end of the stick on which manuscripts were rolled. Dr. W. Smith. [ 1913 Webster ]
3. (Bot.) The hilum. [ 1913 Webster ]
4. (Zool.) (a) A depression or opening in the center of the base of many spiral shells. (b) Either one of the two apertures in the calamus of a feather. [ 1913 Webster ]
5. (Geom.) (a) One of the foci of an ellipse, or other curve. [ Obs. ] (b) A point of a surface at which the curvatures of the normal sections are all equal to each other. A sphere may be osculatory to the surface in every direction at an umbilicus. Called also umbilic. [ 1913 Webster ]
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