SILEX
Si"lex, n. Etym: [L., a finit, a pebblestone.] (Min.)
Defn: Silica, SiO2 as found in nature, constituting quarz, and most sands and sandstones. See Silica, and Silicic.
SILHOUETTE Sil`hou*ette", n. Etym: [F.; — so called from Etienne de Silhoutte, a French minister of finance in 1759, whise diversion it was to make such portraits on the walls of his apartments.]
Defn: A representation of the outlines of an object filled in with a black color; a profile portrait in black, such as a shadow appears to be.
SILHOUETTE
Sil`hou*ette", v. t.
Defn: To represent by a silhouette; to project upon a background, so as to be like a silhouette. [Recent] A flock of roasting vultures silhouetted on the sky. The Century.
SILICA
Sil"i*ca, n. Etym: [NL., from L. silex, silics, a flint.] (Chem.)
Defn: Silicon dioxide, SiO
SILICATE
Sil"i*cate, n.Etym: [Cf. F. silicate.] (Chem.)
Defn: A salt of silicic acid.