'Siliceous' definitions:

Definition of 'siliceous'

(from WordNet)
adjective
Relating to or containing or resembling silica; "gritrock is siliceous sandstone" [syn: siliceous, silicious]

Definition of 'Siliceous'

From: GCIDE
  • Siliceous \Si*li"ceous\, a. [L. siliceus, fr. silex, silicis, a flint.] Of or pertaining to silica; containing silica, or partaking of its nature. [Written also silisious.] [1913 Webster]