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Meaning of ANNULUS

Pronunciation:  'anyulus

WordNet Dictionary
  1. [n]  (fungi) remnant of the partial veil that in mature mushrooms surrounds the lower part of the stem
  2. [n]  a toroidal shape; "a ring of ships in the harbor"; "a halo of smoke"

ANNULUS is a 7 letter word that starts with A.


 Synonyms: anchor ring, anulus, doughnut, halo, ring
 See Also: fairy circle, fairy ring, partial veil, plant part, toroid, velum



Webster's 1913 Dictionary
\An"nu*lus\, n.; pl. {Annuli}. [L.]
1. A ring; a ringlike part or space.

2. (Geom.)
   (a) A space contained between the circumferences of two
       circles, one within the other.
   (b) The solid formed by a circle revolving around a line
       which is the plane of the circle but does not cut it.

3. (Zo["o]l.) Ring-shaped structures or markings, found in,
   or upon, various animals.

Medical Dictionary
 Definition: A ring-like structure such as the ring around a heart valve where the valve leaflet merges with the heart muscle.
Biology Dictionary
  1. A ring; in ferns, the elastic ring of cells, forming part of the sporangium wall, that initiates dehiscence.
  2. In fisheries terminology, a yearly mark formed on the hard parts (scales, bones, otoliths) of fish, corresponding to a period of slow growth.