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annulus Definition

an·nu·lus (anyo̵̅o̅ ləs, -yə-)

noun pl. -·li′--lī′ or -·luses

any ring or ringlike part, mark, etc.

Etymology: L annulus, for anulus: see annular

annulus Usage Examples

Preposition: of

  • disk: These wide long ligaments also constitute the outer layer of the annulus of each disk.

Converse of object

  • use: Length at age of each pike was back-calculated using annuli of individual scales.
  • rotate: In the experimental part of this thesis, a novel method of visualizing flow in a rotating two-layer annulus is implemented.
  • center: The ability to center the annuli is absolutely essential in order to get the best imaging.
  • show: The figure below shows the condenser annulus ( left ) and the phase plate ( right ) from a more appropriate angle.
  • have: This distinction was abandoned in May 1920 and thereafter all ball rounds had the purple annulus.

Adjective modifier

  • elliptical: It bins the image into elliptical annuli or a fan-shaped region of adjacent sectors.
  • outer: An outer annulus around this, is required to secure the ring but this may be ringed with the same paint.
  • wide: Wider apertured annuli are useful but do not seem to provide the subtle effects so easily.
  • posterior: In addition the following injuries can occur:- Cervical Disk Prolapse - caused by a rupture of the posterior disk annulus.

Modifies a noun

  • fibrosus: These layers are joined by a peripheral ring of fibrous tissue, the annulus fibrosus.
  • diameter: Three apertures are defined, a ' star ' aperture diameter, and the inner and outer sky annulus diameter.
  • fibrosis: Each disk consists of a ring of tough fibrous tissue ( annulus fibrosis ) surrounding a jelly-like cent r e ( nucleus pulposus ).
  • geometry: Installed compressor performance Choice of overall annulus geometry: design for rising line, constant mean diameter, falling line.
  • flow: The pressure measurements indicate that ingestion of the highly swirling annulus flow leads to increased vortex strength within the cavity.

Noun used with modifier

  • condenser: While DF and COL offer at least the same resolution, phase contrast limits the resolution due to the condenser annulus.
  • phase: If you have a phase contrast condenser, the largest phase contrast annuli often make excellent patch stops for darkfield!
  • sky: Thus an INNER radius of 1 means that the sky annulus starts where the object aperture ends.