Online Google Dictionary

annuli 中文解釋 wordnet sense Collocation Usage Collins Definition
Noun
/ˈanyələs/,
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annuli, plural;
  1. A ring-shaped object, structure, or region

  1. (annulus) ring: a toroidal shape; "a ring of ships in the harbor"; "a halo of smoke"
  2. (annulus) (Fungi) a remnant of the partial veil that in mature mushrooms surrounds the stem like a collar
  3. (Annulus (firestop)) The Annulus, or annular space, is the space between a penetrant and whatever surrounds it, such as the sides of an opening or a sleeve, as the case may be.
  4. (Annulus (mathematics)) In mathematics, an annulus (the Latin word for "little ring", with plural annuli) is a ring-shaped geometric figure, or more generally, a term used to name a ring-shaped object. Or, it is the area between two concentric circles. ...
  5. (Annulus (oil well)) The annulus (yellow area in diagram) of an oil well refers to any void between any piping, tubing or casing and the piping, tubing or casing immediately surrounding it. ...
  6. (Annulus (zoology)) In zoology, an annulus is an indication of growth in certain species, similar to dendrochronology. For example, in fish, it is a series of of concentric rings (or) formed in the scales of bony fish., whereas in bivalves, they are the concentric rings found on their shells.
  7. (The Annulus) The Annulus (sometimes rendered ANNULUS) is a fictional criminal organization featured in the Azteca Productions' Universe created by Richard Dominguez. The Annulus is a South American-based secret cabal of businessmen. ...
  8. (annulus) A ring- or donut-shaped area or structure; The region 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 ...
  9. (Annulus) Ring like structure - the base of the heart valve that supports the leaflets is referred to as the annulus. The tough tissue comprising the outer ring of a heart valve.
  10. (annulus) Describes a ring, or a ringlike or circular structure.
  11. (Annulus) A mark or ring that forms annually on the otoliths, scales, and other bones of fish, that correspond to the annual period of slow growth that fish go through. Annuli are used by fish managers to determine age and growth of fish.
  12. (Annulus) (pl. annuli, adj. annulate)
  13. (Annulus) The tough outer ring of a spinal disc.
  14. (annulus (annulus fibrosis)) tough fibrous outer wall of an intervertebral disc.
  15. (Annulus) The opening around the penetrant.  For pipe Penetrations, the ring around the pipe where the fill material is applied.
  16. (Annulus) The space between the drillstring and the well wall, or between casing strings, or between the casing and the production tubing
  17. (Annulus (plural annuli)) A distal segment of the either the antenna or antennula, generally tubular in form.
  18. (Annulus) (abbreviated form of annulus fibrosus): A multilaminated ligament surrounding the periphery of each disc space, attaching, craniad and caudad, to end-plate cartilage and ring apophyseal bone and blending centrally with nucleus pulposus. ...
  19. (Annulus) A colored or light circular band.
  20. (Annulus) An outer ring with inward-facing teeth that mesh with the planet gear or gears
  21. (Annulus) Gap between penetrant and inside of surrounding opening in a fire separation.
  22. (Annulus) In ferns, applied to an elastic ring which partially or wholly surrounds, the sporangium and ruptures it at maturity.
  23. (Annulus) The net area created between two mating rings. For example, the difference between a cylinder bore area and the piston rod area.
  24. (Annulus) The outer portion of a disc in the spinal column, the annulus provides structure and strength to a disc and is comprised of a complex series of interwoven layers of fibrous tissues, which hold it's nucleus in place.
  25. (Annulus) The ring of tissue around the periphery of the tympanic membrane that holds it in position at the end of the external auditory canal.