a. 1. Of or pertaining to atra bilis or black bile, a fluid formerly supposed to be produced by the kidneys. [ 1913 Webster ]

2. Melancholic or hypohondriac; atrabilious; -- from the supposed predominance of black bile, to the influence of which the ancients attributed hypochondria, melancholy, and mania. [ 1913 Webster ]

Atrabiliary arteries,
capsules, and
veins (Anat.), those pertaining to the kidney; -- called also renal arteries, capsules, and veins. [ 1913 Webster ]