Lewis Short
ŏbustus, a, um, Part. [ob-uro].
* Lit., burnt around, burnt, hardened in the fire (poet.): hic torre armatus obusto,Verg. A. 7, 506: sudes,id. ib. 11, 894.
* Transf.: glaeba gelu,burnt by frost.Ov. Tr. 5, 2, 66.
Charlton T. Lewis, Charles Short, A Latin Dictionary