The Collaborative International Dictionary
Atramentarious
Atramentarious \At`ra*men*ta"ri*ous\, a. [Cf. F. atramentaire. See Atramentaceous.] Like ink; suitable for making ink. Sulphate of iron (copperas, green vitriol) is called atramentarious, as being used in making ink.
Wiktionary
atramentarious
a. (context obsolete English) Like ink; suitable for making ink.