from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A sturgeon (Acipenser ruthenus) of the Black and Caspian seas, used as a source of caviar.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A common Eurasian species of sturgeon (Acipenser ruthenus), one of the smaller species.
from the GNU version of the Collaborative International Dictionary of English
- n. A small sturgeon (Acipenser ruthenus) found in the Caspian Sea and its rivers, and highly esteemed for its flavor. The finest caviar is made from its roe.
from The Century Dictionary and Cyclopedia
- n. A species of sturgeon, Acipenser ruthenus.
Russian sterlyad', from Old Russian sterlyagi, of Germanic origin.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Russian стерлядь. (Wiktionary)