Lewis Short
(verb) : sŭpĕr-ādĭcĭo, jēci, 3
* To put in or add besides, to superadd (post-class.): quartam partem vini,Pall. Oct. 14, 15: piper his,Apic. 7, 4: decem dies observationi veteri,Macr. S. 1, 14.
Charlton T. Lewis, Charles Short, A Latin Dictionary