Definition of "hemimorphite" []

• A usually white or colorless mineral, essentially Zn4Si2O7(OH)2·H2O, an important ore of zinc. Also called calamine. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "This unfortunate confusion is somewhat lessened by the use of the terms zinc-spar and hemimorphite (_q. v._) for the carbonate and silicate respectively."