bilateral symmetry
Học thuậtThân thiện
Definition
Noun: - The property of being symmetrical about a vertical plane: This describes a specific type of symmetry where an organism or object can be divided into two mirror-image halves along a single, central vertical plane. This is a fundamental characteristic of many animals and some objects.
Usage
The term is primarily used in biological and anatomical contexts to describe body plans. It can also be applied in design, geometry, and art to describe formal, mirror-image balance. - In Biology: It describes organisms with a distinct left and right side that are approximate mirror images. - In Design/Art: It describes a balanced, formal composition where elements on one side of a central axis are mirrored on the other.
Examples
- Noun:
- The bilateral symmetry of a butterfly is evident when its wings are spread.
- Humans exhibit bilateral symmetry, as one side of the body generally mirrors the other.
- The architect designed the building's facade with perfect bilateral symmetry.
Advanced Usage
- Evolutionary Advantage: In biology, bilateral symmetry is often discussed as an evolutionary advancement associated with cephalization (development of a head) and directional movement.
- Contrast with Other Symmetries: It is frequently contrasted with radial symmetry (symmetry around a central point, like a starfish) and asymmetry (lack of symmetry).
Variants and Related Words
- Bilateral (adj): Involving or relating to two sides.
- The two countries signed a bilateral trade agreement.
- Symmetry (n): The quality of being made up of exactly similar parts facing each other or around an axis.
- Radial Symmetry (n): Symmetry around a central axis, as in a starfish or a flower.
- Asymmetry (n): Lack of equality or equivalence between parts or aspects of something; lack of symmetry.
Synonyms
- Mirror symmetry
- Plane symmetry
Antonyms
- Asymmetry
- Radial symmetry (in specific biological/geometric contexts)
Noun
- the property of being symmetrical about a vertical plane