Pronunciation: (sē-er'u), [key]
1. a chain of hills or mountains, the peaks of which suggest the teeth of a saw.
2. any of several Spanish mackerels of the genus Scomberomorus, esp. S. sierra, found in western North America.
3. a word used in communications to represent the letter S.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.