🇬🇧 en es 🇪🇸

annulus noun

  /-li/ , /ˈænjəlaɪ/ , /ˈænjələs/ , /ˈænjʊlaɪ/ , /ˈænjʊləs/
  • A ring- or donut-shaped area, object, or structure.
 anillo
  • (botany) A structure surrounding a sporangium (or part of it) which shrinks and causes it to rupture for spore dispersal; specifically, in a fern: a structure around about two-thirds of the sporangium consisting of differentially thick-walled cells which dry and distort the sporangium; and in a moss: a complete ring of cells around the tip of the sporangium which dissolves to cause the tip to detach.
 anillo, corona circular, annulus, arandela, corona solar
  • (geometry) The region in a plane between two concentric circles of different radii.
  • (topology) Any topological space homeomorphic to the region in a plane between two concentric circles of different radii.
 corona circular, annulus, arandela
  • (astronomy) A ring of light in a celestial body, especially when caused by an annular eclipse (for example, when the Sun and Moon are in line with the Earth, but the Moon does not completely cover the Sun's disc).
 corona solar

🇪🇸 es en 🇬🇧

annulus

annulus
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