- Anatomy. the depression in the center of the surface of the abdomen indicating the point of attachment of the umbilical cord to the embryo; navel.
- Botany, Zoology. a navellike formation, as the hilum of a seed.
Origin of umbilicus
Examples from the Web for umbilicus
In this case the shell is said to be umbilicated, and the opening referred to is the umbilicus.
The other (T. zizyphinus) is usually of a yellowish or pink colour and has no umbilicus.
With umbilicus reaching to the apex; including Bifrontia and Orbis.A Conchological Manual
George Brettingham Sowerby
When the coils of the shell are very compact there is no umbilicus to be seen.
The umbilicus is partially closed by an entering callous plug.
- biology a hollow or navel-like structure, such as the cavity at the base of a gastropod shell
- anatomy a technical name for the navel
Word Origin and History for umbilicus
"navel," 1610s, from Latin umbilicus "navel," from PIE root *(o)nobh- "navel" (see navel). In English, mostly confined to medical writing. Latin umbilicus is source of Spanish ombligo as well as Old French lombril, literally "the navel," from l'ombril, which by dissimilation became modern Fr. nombril (12c.).