ATRABILIOUS Meaning of ATRABILIOUS in English [at.ra.bil.ious] adj [L atra bilis black bile] (1651) 1: given to or marked by melancholy: gloomy 2: ill-natured, peevish -- at.ra.bil.ious.ness n Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012