extemporalitas

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.

extempŏrālĭtas, ātis, f. [extemporalis],

the faculty of extemporaneous speaking or versifying , Suet. Tit. 3 (for which: extemporalis facultas, id. Aug. 84: facultas ex tempore dicendi, Quint. 10, 7, 1).