1. The model included curvature of the growth ring, spiral grain angle and the tangential shrinkage strain.

2. A statistical analysis of the data shows that growth ring curvature and spiral grain angle together explained about 70% of the variation in twist.

3. Annulus [ ăn ′yə-ləs ] Plural annuluses Annuli (ăn′yə-lī′) A ringlike figure, part, structure, or marking, such as a growth ring on the scale of a fish.

4. Annulus [ ăn ′yə-ləs ] Plural annuluses Annuli (ăn′yə-lī′) A ringlike figure, part, structure, or marking, such as a growth ring on the scale of a fish.