a partly translucent variety of opal, which becomes more translucent or transparent when immersed in water.
Origin of hydrophane
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for hydrophane
Historical Examples of hydrophane
It was milk-white, and became translucent in water, like that beautiful variety of opal, the hydrophane.White Shadows in the South Seas
a white partially opaque variety of opal that becomes translucent in water
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012