silicifyPronunciation: /sɪˈlɪsɪfʌɪ/Definition of silicify verb (silicifies, silicifying, silicified) [with object] convert into or impregnate with silica: the calcareous skeleton has been silicifiedDerivatives silicificationPronunciation: /-sɪfɪˈkeɪʃ(ə)n/ noun silicify in other Oxford dictionaries Definition of silicify in the US English dictionary