open-pit

[oh-puhn-pit]

o·pen-pit

[oh-puhn-pit]
adjective Mining.
noting or pertaining to a type of surface mining in which massive, usually metallic mineral deposits are removed by cutting benches in the walls of a broad, deep funnel-shaped excavation.

Origin:
1910–15
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Open-pit is always a great word to know.
So is doohickey. Does it mean:
a gadget; dingus; thingumbob.
a scrap or morsel of food left at a meal.
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