Meaning of sorosilicate

so•ro•sil•i•cate

Pronunciation: (sôr"ō-sil'i-kit, -kāt", sōr"-), [key]
— n. Mineral.
  1. any of the silicates in which each silicate tetrahedron shares one of its four oxygen atoms with a neighboring tetrahedron, the ratio of silicon to oxygen being two to seven. Cf.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.