hydrophane noun.
['hʌɪdrǝfeɪn] L18.[from HYDRO- + Greek -phanēs apparent, phanos bright, clear, from phainein to show.]A white variety of opal that absorbs water and becomes more translucent on immersion.
■ hy'drophanous adjective becoming more translucent on immersion
L18. [TahlilGaran] English Dictionary ▲