Dictionary

allophane

noun al·lo·phane \ˈa-lə-ˌfān\

Definition of ALLOPHANE

:  an amorphous translucent mineral of various colors often occurring in incrustations or stalactite forms and consisting of a hydrous aluminum silicate
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Origin of ALLOPHANE

Greek allophanēs appearing otherwise, from all- + phainesthai to appear, middle voice of phainein to show — more at fancy
First Known Use: circa 1821

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