Definition of persnicketiness in US English:

persnicketiness

(also persnickitiness, persnickityness)

noun

North American
informal
  • The quality of being persnickety.

Origin

Early 20th century; earliest use found in Fort Wayne (Indiana) News & Sentinel. From persnickety + -ness.

Pronunciation

persnicketiness

/pəˈsnɪkɪtɪnɪs/