taphole

[tap-hohl]

tap·hole

[tap-hohl]
noun Metallurgy.
a hole in a blast furnace, steelmaking furnace, etc., through which molten metal or slag is tapped off.

Origin:
1585–95; tap2 + hole
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Taphole is always a great word to know.
So is law of orbits. Does it mean:
says that for every action there is an equal and opposite reaction
says all planets move in elliptical orbits with the sun at one focus
Collins
World English Dictionary
taphole (ˈtæpˌhəʊl)
 
n
a hole in a furnace for running off molten metal or slag

Collins English Dictionary - Complete & Unabridged 10th Edition
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