\Lap`i*des"cent\, a. [L. lapidescens, p. pr. of
lapidescere to become stone, fr. lapis, -idis, stone: cf. F.
lapidescent.]
Undergoing the process of becoming stone; having the capacity
of being converted into stone; having the quality of
petrifying bodies.

\Lap"i*des"cent\, n.
Any substance which has the quality of petrifying other
bodies, or of converting or being converted into stone.