anulus

(redirected from anuli)
Also found in: Dictionary, Thesaurus, Encyclopedia.

anulus

 [an´u-lus] (pl. a´nuli) (L.)
a small ring or encircling structure; also spelled annulus.
anulus fibro´sus
1. fibrous ring of heart; any of four dense fibrous rings, one of which surrounds each of the major cardiac orifices.
2. fibrous ring of intervertebral disk; the circumferential ringlike portion of an intervertebral disk.
anulus of spermatozoon a dark ringlike structure at the posterior end of the middle piece of a spermatozoon. Called also ring centriole.

ring

(ring), [TA]
1. A circular band surrounding a wide central opening; an anular or circular structure surrounding an opening or level area. Synonym(s): anulus [TA]
2. The closed (that is, endless) chain of atoms in a cyclic compound; commonly used for "cyclic" or "cycle."
3. A marginal growth on the upper surface of a broth culture of bacteria, adhering to the sides of the test tube in the form of a circle.
Synonym(s): anulus
[A.S. hring]

ring

(ring) [TA]
1. Anular or circular structure surrounding an opening or level area.
Synonym(s): anulus [TA] .
2. anatomy Anulus.
3. The closed chain of atoms in a cyclic compound; commonly used for "cyclic" or "cycle."
4. A marginal growth on the upper surface of a broth culture of bacteria, adhering to the sides of the test tube in the form of a circle.
References in periodicals archive ?
Ala anterior con banda basal cubierta de escamas cafe, muy notoria, bordeada por escamas blancas y cafe la que sigue; claviforme insinuada levemente y de forma subtriangular, anuli cafe oscuro, mas claro al centro; orbicular cubierta por escamas blanquecinas y con el color de fondo por anuli; post mediana dentada cubierta por escamas cafe y blanco; area subterminal matizada por escamas blanquecinas, salpicada por algunas castano oscuro; la banda subterminal lineal, muy marcada y cubierta por escamas cafe, cilias terminales muy fuertes y espatuladas; faz inferior cubierta por escamas y escamas piliformes blanquecinas.