1.NounA deceptive, irregular, or false form; specifically:
A mineral that formed by replacement of an existing mineral (or organic matter) such that the new mineral has the appearance and dimensions of the original.
"Petrified wood is a silicic pseudomorph of the original wood."
2.NounA mineral that formed by replacement of an existing mineral (or organic matter) such that the new mineral has the appearance and dimensions of the original.
"Petrified wood is a silicic pseudomorph of the original wood."