annulus
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About Our Definitions: All forms of a word (noun, verb, etc.) are now displayed on one page.an·nu·lus
noun \ˈan-yə-ləs\ plural an·nu·li\-ˌlī, -(ˌ)lē\ also an·nu·lus·es
Definition of ANNULUS
1
: ring
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
an·nu·lus
noun \ˈan-yə-ləs\ (Medical Dictionary)plural ; an·nu·li \-ˌlī\ (audio pronunciation)also ; an·nu·lus·es
Medical Definition of ANNULUS
: a ringlike part, structure, or marking; especially : any of various ringlike anatomical parts (as the inguinal ring)
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