Lewis Short
mātrĭcīda (noun Comm) : (scanned matrĭcĭda, Sid. Carm. 5, 291), , mater-caedo
* A mother's murderer, a matricide (rare but class.): quem scribis certissimum matricidam,Cic. Q. Fr. 1, 2, 2; Nep. Alc. 6, 2: cantavit Oresten matricidam,Suet. Ner. 21.—In tmesi: matrique cida Nero,Aus. de XII. Caes. 35 (al. matrīcīda Nero).
Charlton T. Lewis, Charles Short, A Latin Dictionary