Annulus

Annulus (from Latin anulus "small ring") stands for:

• Annulus (skin) , ring-shaped fold of skin
• Annulus (muscle) , a ring-shaped muscle field, for example in the nautilus or beard worms
• Annulus (mycology) , ring or cuff on the stem of cap mushrooms
• Annulus (deep drilling technique) , the space between the drill string or the casing and the surrounding formation or another casing

See also:

• Annulus

Wiktionary: Annulus  - explanations of meanings, word origins, synonyms, translations

This is a disambiguation page for differentiating between several terms identified with the same word.