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/ˈæl.əˌfeɪn/ · noun
(mineralogy) An amorphous hydrous aluminium silicate clay mineral.
Use allophane when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Allophane means (mineralogy) An amorphous hydrous aluminium silicate clay mineral.
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use allophane where its definition matches the intended context.
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