The Collaborative International Dictionary
Tartarean \Tar*ta"re*an\, Tartareous \Tar*ta"re*ous\, a. [L. tartareus: cf. F. tartar['e]en.] Of or pertaining to Tartarus; hellish.
Tartareous \Tar*ta"re*ous\, a. [Cf. 1st Tartarous.]
Consisting of tartar; of the nature of tartar.
(Bot.) Having the surface rough and crumbling; as, many lichens are tartareous.
Wiktionary
a. 1 Consisting of tartar; of the nature of tartar. 2 (context botany English) Having a rough, crumbly surface.
Usage examples of "tartareous".
Thus God the Heav'n created, thus the Earth, Matter unform'd and void: Darkness profound Cover'd th' Abyss: but on the watrie calme His brooding wings the Spirit of God outspred, And vital vertue infus'd, and vital warmth Throughout the fluid Mass, but downward purg'd The black tartareous cold infernal dregs Adverse to life: then founded, then conglob'd Like things to like, the rest to several place Disparted, and between spun out the Air, And Earth self-ballanc't on her Center hung.