annulus plural
an·nu·lus
The plural form of annulus is annuli
A aDefinitions
- noun plural annulus a ring; a ringlike part, band, or space. 1
- noun plural annulus Geometry. the space between two concentric circles on a plane. 1
- noun plural annulus the veil remnant on a mushroom stalk. 1
- noun plural annulus a growth ring, as on the cross section of a tree trunk, that can be used to estimate age. 1