化石;發呆
Petrification \Pet`ri*fi*ca"tion\, n. [Cf. F. p['e]trification.
See {Petrify}.]
1. See {Petrifaction}.
2. Fig.: Obduracy; callousness. --Hallywell.
petrification
n : the process of turning some plant material into stone by
infiltration with water carrying mineral particles
without changing the original shape [syn: {petrifaction}]