enneagonal

A child draws an enneagonal shape on a piece of paper.

Definition

Adjective: Having nine sides and nine angles; relating to or shaped like an enneagon (a nine-sided polygon).

Usage Examples

• (The garden had the shape of a nine-sided figure.)
• (We studied the properties of a nine-sided polygon.)

Advanced Usage

• "enneagonal symmetry": a type of symmetry based on a nine-fold rotational axis, often found in certain crystal structures or decorative patterns.
  • The cathedral's rose window displayed an enneagonal symmetry, with nine identical sections radiating from the center. (The window had nine repeating parts arranged around a central point.)

Variants and Related Words

• Enneagon (noun): a nine-sided polygon.
  • An enneagon has nine vertices and nine edges. (A nine-sided shape.)
• Enneagonal (adj): having nine sides or angles.
  • The coin was struck in an enneagonal shape to prevent forgery. (The coin had nine sides.)

Synonyms

• Nonagonal: a less common synonym for enneagonal, derived from the Latin prefix "nona-" (nine) instead of the Greek "ennea-".
  • The building had a nonagonal floor plan. (A nine-sided layout.)

Related Idioms

• There are no common idioms directly using "enneagonal," as it is a technical term primarily used in geometry and design. However, in metaphorical or creative contexts, one might say:
  • "An enneagonal puzzle": a complex or multifaceted problem with nine distinct aspects.

    • The negotiations were like an enneagonal puzzle — every corner represented a different interest group. (The situation had nine challenging parts to resolve.)