Lewis Short
ocris (noun M) = ὄκρις: [akin to acer, ocior, root ac-]
* A broken, rugged, stony mountain (ante-class.): ocrem antiqui montem confragosum vocabant, ut apud Livium: qui ascendunt altum ocrim; et, celsosque ocrīs arvaque petria; et, namque Taenari celsos ocrīs; et, in Pelio ocri, Paul. ex Fest. p. 181 Müll.
Charlton T. Lewis, Charles Short, A Latin Dictionary