silica

As nouns the difference between alumina and silica

is that alumina is aluminum oxide used especially in mining, material sciences and ceramics while silica is silica.

As a noun silica

is silica.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between silane and silica

is that silane is while silica is silica.

As nouns the difference between halite and silica

is that halite is while silica is silica.

As nouns the difference between silica and kaolin

is that silica is silicon dioxide while kaolin is a fine clay, rich in kaolinite, used in ceramics, paper-making, etc.

As nouns the difference between silicium and silica

is that silicium is while silica is silica.

As nouns the difference between quartzite and silica

is that quartzite is a metamorphic rock consisting of interlocking grains of quartz while silica is silica.

As nouns the difference between abrak and silica

is that abrak is fodder (food for animals) while silica is silica.

As a noun silica is

silica.