from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The layer of wood formed in a plant during a single year. Annual rings appear concentric when viewed in cross section.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The layer of wood, observed as one of many concentric rings when cut, formed during one year of a plant's growth
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. an annual formation of wood in plants as they grow
Sorry, no etymologies found.