Lewis Short
conservātĭo (noun F) : id.
* A keeping, preserving (several times in Cic.; elsewh. very rare): frugum,Cic. Off. 2, 3, 12: Marii,i. e. of his life,Val. Max. 2, 10, 6.— Trop.: bonorum, * Quint. 5, 10, 33: patriae, Num. Gallieni ap. Eckhel. 7, p. 408: naturae (with convenientia),Cic. Off. 1, 28, 100: decoris,id. ib. 1, 36, 131: aequabilitatis,id. de Or. 1, 42, 188.
Charlton T. Lewis, Charles Short, A Latin Dictionary