bilateral symmetry

noun

: symmetry in which similar anatomical parts are arranged on opposite sides of a median axis so that only one plane can divide the individual into essentially identical halves

Example Sentences

Recent Examples on the Web Related Articles Dakota beadwork often uses the concept of bilateral symmetry — the children’s coat’s left and right lapels are completely identical. Liv Martin, Twin Cities, 1 Dec. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'bilateral symmetry.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History

First Known Use

1828, in the meaning defined above

Time Traveler
The first known use of bilateral symmetry was in 1828

Dictionary Entries Near bilateral symmetry

Cite this Entry

“Bilateral symmetry.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/bilateral%20symmetry. Accessed 27 Nov. 2022.

Kids Definition

bilateral symmetry

noun

: plant and animal symmetry in which similar parts are arranged so that one and only one plane can divide the individual into identical or nearly identical halves compare radial symmetry

Medical Definition

bilateral symmetry

noun

: symmetry in which similar anatomical parts are arranged on opposite sides of a median axis so that one and only one plane can divide the individual into essentially identical halves

More from Merriam-Webster on bilateral symmetry

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!


Odd Habits and Quirks

  • image1926873504
  • Which of the following best describes an easily irritated person?
Spell It

Hear a word and type it out. How many can you get right?

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ