Excessively concerned with minor details or rules; fussy. The persnickety editor insisted on reviewing every comma and period in the manuscript.
Requiring a particularly precise or careful approach. The persnickety nature of the task meant that only the most meticulous workers were assigned to it.
Displaying an arrogant or snobbish attitude; pretentiously refined or fastidious. The persnickety maître d' turned away anyone not wearing a jacket.