E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Sierra (3 syl., Spanish, a saw).
A mountain whose top is indented like a saw; a range of mountains whose tops form a saw-like appearance; a line of craggy rocks; as Sierra Morena (where many of the incidents in Don Quixote are laid). Sierra Nevada (the snowy range), Sierra Leone (in West Africa, where lions abound), etc.