RhymeZone: aluminosilicate definitions

Definitions of aluminosilicate:

noun: (inorganic chemistry) Any of many silicate minerals, such as feldspar and zeolite, in which a proportion of the Si⁴⁺ ions are replaced by Al³⁺, the excess negative charge being balanced by extra sodium, potassium or calcium ions.

(Definitions from Wiktionary)