incensio, ōnis, f. [incendo],
a setting on fire , burning (rare but class.): Capitolii, Cic. Cat. 3, 4, 9: incensione urbem liberavi, id. Sull. 11, 33: turis, Arn. 7, 234.
incēnsiō ōnis, f 1 in+CAND-, a setting on fire, burning : Capitoli: incensione urbem liberavi. ...
An Elementary Latin Dictionary