from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A layer or series of layers of sediment deposited in a body of still water in one year.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An annual layer of sediment or sedimentary rock.
Swedish varv, layer, from varva, to bend, from Old Norse hverfa.(American Heritage® Dictionary of the English Language, Fourth Edition)