Lewis Short
herctum | erctum (noun N) : or , , HORCTUM et FORCTUM pro bono dicebant, Paul. ex Fest. p. 102 Müll.; perh. kindr. with heres. In the old jurid. lang.
* An inheritance, estate, patrimony; only in the connection herctum (erct-) ciere (whence is derived herciscere), to divide an inheritance: qui, quibus verbum herctum cieri oporteat, nesciat,Cic. de Or. 1, 56, 237: herctum non citum,an undivided inheritance,Gell. 1, 9, 12; cf. Don. ap. Serv. Verg. A. 8, 642: herctum citum fit inter consortes, Paul. ex Fest. p. 82 Müll.
Charlton T. Lewis, Charles Short, A Latin Dictionary