English-Finnish translations for annulus

• annulus
• kehä
  surkastunut kehä
  ajatukset kiertävät kehää
• rengasalue
• rinkilä

Definition of annulus

• A ring- or donut-shaped area or structure
• Any topological space homeomorphic to the region in a plane between two concentric circles of different radius
• Structure in a fern that consists of differentially thick-walled cells on a sporangium that bend and distort as a result of drying
• The space contained between the centre well bore and any external tubing. Sometimes used for separated gas flow

Related words

• annul
• annulled
• cannula
• annulment
• annuler
• annulet
• annular
• annulene
• annullable