hapaxn.

1887 Catal. Garrett Biblical Inst. 51 Ye ought earnestly to contend for the faith once for all delivered unto the saints... Any Greek professor will tell you that is the only sense in which hapax is used.]

1894 W. Affleck tr. F. Godet Introd. New Test. 598 Reuss refuses to attach the least value to the question of the hapax [Fr. hapax].

1926 Classical Weekly 26 Apr. 188/1 ‘Hapaxes’ are not always quite fairly exploited.

1962 Amer. Speech 37 54 He..rejects a Middle English hapax as a genuine idiom unless he can trace it back to an Old Norse..word.

2002 Courier-Mail (Brisbane) 3 Jan. 25/1 As all good Scrabble-heads will know, a Shakespearean hapax is a word used only once by the Bard which, as a result, has found its way into a dictionary.