tummy button

noun
🔊/ˈtʌmi bʌtn/
🔊/ˈtʌmi bʌtn/
(British English)
(also belly button British and North American English)
(informal) used especially by children or when speaking to children尤为儿语或对儿童说话时用
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  1. the navel (= the small round part in the middle of the stomach, on the front of somebody's body, where the umbilical cord was cut at birth)Topics Bodyc2