Annuli

3 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Annulus \An"nu*lus\, n.; pl. {Annuli}. [L.]
     1. A ring; a ringlike part or space.
        [1913 Webster]
  
     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.
            [1913 Webster]
  
     3. (Zool.) Ring-shaped structures or markings, found in, or
        upon, various animals.
        [1913 Webster]

From WordNet (r) 2.0 [wn]:

  annulus
       n 1: a toroidal shape; "a ring of ships in the harbor"; "a halo
            of smoke" [syn: {ring}, {halo}, {anulus}, {doughnut}, {anchor
            ring}]
       2: (Fungi) remnant of the partial veil that in mature mushrooms
          surrounds the lower part of the stem
       [also: {annuli} (pl)]

From WordNet (r) 2.0 [wn]:

  annuli
       See {annulus}