ATOMIC; ATOMICAL a.
some simple ratio, as of one to one, two to three, or some other, always expressible in whole numbers. -- Atomic weight (Chem.), the weight of the atom of an element as compared with the weight of the atom of hydrogen, taken as a standard.
ATRABILIARY a.
Melancholic or hypohondriac; atrabilious; -- from the supposed predominance of black bile, to the influence of which the ancients attributed hypochondria, melancholy, and mania. Atrabiliary arteries, capsules, and veins (Anat.), those pertaining to the kidney; -- called also renal arteries, capsules, and veins.…