Definition

Noun: The state or quality of having or exhibiting two sides, or specifically, the property of being symmetrical about a vertical plane. This term is often used in biology, anatomy, and geometry to describe structures or arrangements that are identical on the left and right sides of a central axis.

Usage

The noun "bilaterality" is used in formal and academic contexts to describe symmetrical organization. It is not commonly used in everyday conversation. * The bilaterality of the human body is a fundamental aspect of its anatomical design. * The study focused on the genetic basis for bilaterality in animal development.

Advanced Usage

• Evolutionary Biology: In evolutionary biology, "bilaterality" refers to a major body plan characteristic of a large group of animals (Bilateria), where organisms develop with a roughly symmetrical right and left side.
  • The evolution of bilaterality is considered a key innovation in the history of animal life.

Variants and Related Words

• Bilateral (adjective): Involving or affecting two sides; having or relating to two sides.
  • The two nations signed a bilateral trade agreement.
  • Most animals have bilateral symmetry.
• Bilaterally (adverb): In a way that involves two sides or parties.
  • The treaty was bilaterally negotiated.

Synonyms

• Bilateral symmetry: (noun phrase) The specific type of symmetry where an organism or object can be divided into mirror-image halves along a single plane.
• Symmetry: (noun) The quality of being made up of exactly similar parts facing each other or around an axis. (This is a broader term.)

Antonyms

• Asymmetry: (noun) Lack of equality or equivalence between parts or aspects of something; lack of symmetry.
• Radial symmetry: (noun phrase) Symmetry around a central axis, as in a starfish or a flower.

Noun

1. the property of being symmetrical about a vertical plane