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taphole

noun
tap·​hole | \ ˈtap-ˌhōl \

Definition of taphole

: a hole for a tap specifically : a hole at or near the bottom of a furnace or ladle through which molten metal, matte, or slag can be tapped

First Known Use of taphole

1594, in the meaning defined above

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The first known use of taphole was in 1594

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