Dictionary > Umbilicus

Umbilicus

umbilicus
1. (Science: anatomy) The depression, or mark, in the median line of the abdomen, which indicates the point where the umbilical cord separated from the foetus; the navel.
2. An ornamented or painted ball or boss fastened at each end of the stick on which manuscripts were rolled.
3. (Science: botany) The hilum.
4. (Science: zoology) A depression or opening in the center of the base of many spiral shells. Either one of the two apertures in the calamus of a feather.
5. (Science: geometry) One of foci of an ellipse, or other curve. 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.
Synonym: umbilic.
Origin: L. See Umbilic.


You will also like...

The process of photosynthesis
Photosynthesis – Photolysis and Carbon Fixation

Photosynthesis is the process that plants undertake to create organic materials from carbon dioxide and water, with the ..

Salmon jumping upstream in the river
Lotic Communities & Animals

A running water environment offers numerous microhabitats for many types of animals. Similar to plants, animals in lotic..

Oligodendrocyte and Schwann cell
The Central Nervous System

Myelin sheath is essential for a faster conductivity of signals. Know more about this feature of some neurons in the Cen..

Early Mammals on Earth
Early Mammals on Earth

The Earth's ecosphere was rapidly changing and throwing up a wide range of ecological niches that new adaptive organisms..

Genetic engineering
Genetic Engineering Advantages & Disadvantages

This tutorial presents the benefits and the possible adverse eventualities of genetic engineering. Know more about this ..

Principles of Hormonal Control Systems
Principles of Hormonal Control Systems

Hormones are essential in the regulation of the activity of the various biological systems of the human body. The ineffi..