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/ˈbæs.ɒlt/ · noun
(mineralogy) A hard mafic igneous rock of varied mineral content; volcanic in origin, which makes up much of the Earth's oceanic crust..
Use basalt when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Basalt means (mineralogy) A hard mafic igneous rock of varied mineral content; volcanic in origin, which makes up much of the Earth's oceanic crust..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use basalt where its definition matches the intended context.
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