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tubercule

noun
tu·​ber·​cule | \ ˈt(y)übə(r)ˌkyül\
plural -s

Definition of tubercule

1 : tubercle
2 : a small knob or button of rust formed on the inside of an iron pipe

First Known Use of tubercule

1596, in the meaning defined at sense 1

History and Etymology for tubercule

French, from Latin tuberculum

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