annulation

A child forms an annulation with a piece of string.

Definition

1. Noun:
   • The act of forming into a ring: "annulation" refers to the process of making something into a ring-like shape or structure.
   • A ring or ring-like structure: In biology or chemistry, "annulation" can denote a ring-shaped part or the formation of a ring in a molecule or organism.

Usage Examples

• Noun:
  • The annulation of the bracelet was achieved by bending the metal into a perfect circle. (The action of forming a ring.)
  • In chemistry, the annulation reaction created a cyclic compound. (The formation of a ring structure in a molecule.)

Advanced Usage

• "annulation in botany": the formation of ring-like structures in plants, such as the annulus of a fern sporangium.

  • The annulation of the fern's sporangium helps in spore dispersal. (The ring-shaped mechanism aids release.)

• "annulation in geology": the process of forming ring-like features in rock formations.

  • The annulation of the cave stalactites was observed over centuries. (The development of circular shapes.)

Variants and Related Words

• Annular (adj): ring-shaped.

  • The annular eclipse occurs when the moon covers the sun's center, leaving a ring of light. (Ring-shaped.)

• Annulate (adj): having rings or ring-like markings.

  • The annulate structure of the worm's body is clearly visible. (Marked with rings.)

Synonyms

• Ring formation: the process of creating a circular shape.
• Cyclization: the formation of a ring in a chemical compound (specific to chemistry).

Phrasal Verbs

None commonly associated with "annulation" as a noun.

Related Idioms

• "to form a ring": to create a circular arrangement.
  • The dancers formed a ring around the fire. (They created a circle.)