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annulus

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noun an·nu·lus \ˈan-yə-ləs\

Definition of annulus

plural an·nu·liplay \-ˌlī, -(ˌ)lē\ also an·nu·lus·es

  1. 1 :  ring

  2. 2 :  a part, structure, or marking resembling a ring: as a :  a line of cells around a fern sporangium that ruptures the sporangium by contracting b :  a growth ring (as on the scale of a fish) that is used in estimating age



Origin of annulus

Medieval Latin, from Latin anulus finger ring, from anus ring — more at anus


First Known Use: 1563


Medical Dictionary

annulus

play
noun an·nu·lus \ˈan-yə-ləs\

Medical Definition of annulus

plural an·nu·li \-ˌlī\play also an·nu·lus·es

  1. :  a ringlike part, structure, or marking; especially :  any of various ringlike anatomical parts (as the inguinal ring)




Learn More about annulus

  1. Medical Dictionary: Definition of "annulus"


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