atramentous

CIDE DICTIONARY

atramentous, a. 

 Of or pertaining to ink; inky; black, like ink; as, atramental galls; atramentous spots.  [1913 Webster]

ROGET THESAURUS

atramentous

Blackness

VB be black, render black, blacken, infuscate, denigrate, blot, blotch, smutch, smirch, darken, black, sable, swarthy, somber, dark, inky, ebony, ebon, atramentous, jetty, coal-black, jet-black, fuliginous, pitchy, sooty, swart, dusky, dingy, murky, Ethiopic, low-toned, low in tone, of the deepest dye, black as jet, black as my hat, black as a shoe, black as a tinker's pot, black as November, black as thunder, black as midnight, nocturnal, nigrescent, gray, obscure.