- 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. 2018
Examples from the Web for 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