ALL meanings of annulus
an·nu·lus
A a - noun annulus the area between two concentric circles 3
- noun annulus a ring-shaped part, figure, or space 3
- noun annulus any ring or ringlike part, mark, etc. 3
- noun annulus An annulus is the space between two concentric objects (= objects of the same shape in which a larger one surrounds a smaller one), for example, between the wellbore and casing. 3
- 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
- noun annulus A ring -shaped object, structure, or region. 1
- noun annulus A ring- or donut-shaped area or structure. 0
- noun annulus (geometry) The region in a plane between two concentric circles of different radius. 0
- noun annulus (topology) Any topological space homeomorphic to the region in a plane between two concentric circles of different radius. 0
- noun annulus (astronomy) The ring of the sun not covered by the moon in an annular solar eclipse. 0
- noun annulus (botany) Structure in a fern that consists of differentially thick-walled cells on a sporangium that bend and distort as a result of drying. 0
- noun annulus (mycology) The membranous remnants of a partial veil which leaves a ring on the stem of a mushroom. 0
- noun annulus (oil and gas production) The space contained between the centre well bore and any external tubing. Sometimes used for separated gas flow. 0