umbilicus

noun, plural um·bil·i·ci [uhm-bil–uh-sahy, uhm-buh–lahy-sahy] /ʌmˈbɪl əˌsaɪ, ˌʌm bəˈlaɪ saɪ/.

1. 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.
2. Botany, Zoology. a navellike formation, as the hilum of a seed.

noun plural -bilici (-ˈbɪlɪˌsaɪ, -bɪˈlaɪsaɪ)

1. biology a hollow or navel-like structure, such as the cavity at the base of a gastropod shell
2. anatomy a technical name for the navel

n.“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.). n. pl um•bil•i•ci (-sī′)

1. navel