Annulus

Pronunciation: /ˈæn.jə.ləs/

Definitions of annulus

noun a ring-shaped structure or part, such as the area between the two concentric circles

Example Sentences

A1 The annulus is a ring-shaped structure in biology.

A2 The annulus of a tree trunk helps determine its age.

B1 The annulus of a disc is the outer ring that provides support.

B2 The annulus of a planet is the region between two concentric circles.

C1 The annulus of a black hole is a boundary beyond which nothing can escape.

C2 The annulus of a galaxy contains stars, gas, and dust in a ring-like structure.

Examples of annulus in a Sentence

formal The annulus is the outermost layer of the intervertebral disc.

informal I learned in biology class that the annulus is like a protective ring around the disc.

slang The annulus is like the disc's bodyguard, keeping it safe and secure.

figurative The annulus acts like a fortress, protecting the inner parts of the disc from harm.

Grammatical Forms of annulus

• past tense: annulated
• plural: annuli
• comparative: more annular
• superlative: most annular
• present tense: annulus
• future tense: will annulate
• perfect tense: have annulated
• continuous tense: is annulating
• singular: annulus
• positive degree: annular
• infinitive: to annulate
• gerund: annulating
• participle: annulating

Origin and Evolution of annulus

First Known Use: 1601 year

Language of Origin: Latin

Story behind the word: The word 'annulus' originated from Latin, derived from the word 'annulus' meaning ring or circle.

Evolution of the word: Originally used in geometry to refer to a ring-shaped object, the term 'annulus' has evolved to be used in various scientific fields to describe a ring-like structure or shape.