Lewis Short
sustentācŭlum (noun N) : sustento
* A prop, stay, support.
* Lit. (post-Aug. and very rare): sustentaculum, columen,Tac. H. 2, 28.
* Transf., sustenance, nourishment: sustentaculum sumptuosum corporis,Aug. Mor. Eccl. Cath. 33.
Charlton T. Lewis, Charles Short, A Latin Dictionary