[fas.tid.i.ous] adj [ME, fr. L fastidiosus, fr. fastidium disgust, prob. fr. fastus arrogance (prob. akin to L fastigium top) + taedium irksomeness--more at tedium] (15c) 1 archaic: scornful
2. a: having high and often capricious standards: difficult to please "critics ... so ~ that they can talk only to a small circle of initiates --Granville Hicks" b: showing or demanding excessive delicacy or care c: reflecting a meticulous, sensitive, or demanding attitude "~ workmanship"
3: having complex nutritional requirements "~ microorganisms" -- fas.tid.i.ous.ly adv -- fas.tid.i.ous.ness n