Pronunciation: (an'yu-lus), [key]
—pl. -liPronunciation: (-lī"), [key] -lus•es.
1. a ring; a ringlike part, band, or space.
2. Geom.the space between two concentric circles on a plane.
3. the veil remnant on a mushroom stalk. See illus. under mushroom.
4. a growth ring, as on the cross section of a tree trunk, that can be used to estimate age.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.