Exacting
 

exacting
adjective1.having complicated nutritional requirements; especially growing only in special artificial cultures; "fastidious microorganisms"; "certain highly specialized xerophytes are extremely exacting in their requirements"[syn: fastidious][ant: unfastidious]2.severe and unremitting in making demands; "an exacting instructor"; "a stern disciplinarian"; "strict standards"[syn: stern]3.requiring precise accuracy; "an exacting job"; "became more exigent over his pronunciation"[syn: exigent]