silica gel
GRANULAR, VITREOUS, POROUS FORM OF SILICON DIOXIDE
Siliceous gel; Silica gel crystals; Silica gel crystal; Do not eat; Silica Gel; Kieselgel; Silicagel; SiO2·nH2O; Amorphous silica gel; Silica Gel Desiccant
¦ noun hydrated silica in a hard granular hygroscopic form used as a desiccant.