ido·crase | \ ˈī-də-ˌkrās 
, ˈi-, -ˌkrāz \
, ˈi-, -ˌkrāz \Definition of idocrase
: a mineral that is a complex silicate especially of calcium, magnesium, iron, and aluminum
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Time Traveler for idocrase
The first known use of idocrase was in 1804
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