IPA: /ʌmˌbɪlɪˈkeɪʃən/
KK: /ʌmˌbɪlɪˈkeɪʃən/
A small, navel-like indentation or dimple in the center of a rounded object.
The fruit had a noticeable umbilication at its center, making it look unique.
Umbilication is formed from "umbilicus" (meaning navel or belly button) and the suffix "-ation" (meaning the action or process of). The word refers to the process or condition related to the navel.
Think of the word 'umbilicus' which means navel, and remember that 'umbilication' refers to the process related to the navel.