Annulus

Meaning

Noun

●

A

- or donut-shaped area or structure.

●

In Anatomy & Cardiology:

A

of

;

(cardiology), such a

an

of a

, to which the

and

of the

and

are

; an

annulus fibrosus

cordis.

●

In Astronomy:

A

of

in a

, especially when

by an

annular eclipse

(

, when the Sun and Moon are

the Earth, but the Moon does not

the Sun's disc).

●

In Biology & Botany:

A structure

a

(or part of it) which

and

it to

for

;

, in a

: a structure

of the

thick-walled cells which

and

the

; and in a

: a

of cells around the

of the

which

to cause the

to detach.

●

In Biology & Mycology:

The

of a

which

on the

of a mushroom.

●

In Geometry & Mathematics:

The

in a

between two

of different radii.

●

In Mathematics & Topology:

Any

topological space

to the

in a

between two

of different radii.

●

In Technology:

In a well such as an

or water well: the

between a

or

and any

,

,

, or

of a

it.

Sourced from

Related

More

Join 10 million students and professionals writing 70% faster at QuillBot.com

Start writing better