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Webster 1913 Edition

Adj.

[L.

silex

silicis

, a flint +

-ferous

Producing silica; united with silica.

Adj.

[L. silex and fero, to produce.] Producing silex; or united with a portion of silex.

siliciferous ‎(comparative more siliciferous, superlative most siliciferous)