Lewis Short
fămŭlātus (noun M) : famulor
* Servitude, slavery (rare but class.): in famulatu esse,Cic. Lael. 19, 70: quam miser virtutis famulatus servientis voluptati!id. Off. 3, 33, 117: gravis,Sen. Hippol. 991: in famulatum subeunte natura,Arn. 1, 26: omnis,Vulg. Exod. 1, 14.
Charlton T. Lewis, Charles Short, A Latin Dictionary