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Pronunciation varies by accent · noun
A tetrahedron with three pairs of faces at right angles to one another..
Use orthotetrahedron when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Orthotetrahedron means A tetrahedron with three pairs of faces at right angles to one another..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use orthotetrahedron where its definition matches the intended context.
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