D defs.my
Entry 1 sense Webster, 1913

Siliceous

· Si·li·ceous · IPA /sɪˈlɪ.ʃəs/
01 a. Of or pertaining to silica; containing silica, or partaking of its nature.
  1. 1.
    Of or pertaining to silica; containing silica, or partaking of its nature.