INFERN'AL, a. [L. infernus.]

1. Properly, pertaining to the lower regions, or regions of the dead, the Tartarus of the ancients. Hence,

2. Pertaining to hell; inhabiting hell; as infernal spirits.

3. Hellish; resembling the temper of infernal spirits; malicious; diabolical; very wicked and detestable.

INFERN'AL, n. An inhabitant of hell, or of the lower regions.

Infernal stone [Lapis infernalis.] a name formerly given to lunar caustic, a substance prepared from an evaporated solution of silver, or from crystals of silver.

Lunar caustic is nitrate of silver fused and cast in small cylinders.