green sand
Noun
Meaning
green sand (countable and uncountable, plural green sands)
An aggregate of sand, bentonite clay, pulverized coal, and water, used in making moulds for metal casting.
Noun
green sand (countable and uncountable, plural green sands)
An aggregate of sand, bentonite clay, pulverized coal, and water, used in making moulds for metal casting.