annulus
noun
Meaning
- A ring- or donut-shaped area or structure.
- The region in a plane between two concentric circles of different radii.
- Any topological space homeomorphic to the region in a plane between two concentric circles of different radius.
- The ring of the sun not covered by the moon in an annular solar eclipse.
- Structure in a fern that consists of differentially thick-walled cells on a sporangium that bend and distort as a result of drying.
- The membranous remnants of a partial veil which leaves a ring on the stem of a mushroom.
Etymology / origin
No prose etymology has been added yet.
No ancestor words have been linked yet.
Related words
Descendant words
No descendant words have been linked yet.