symmetry

noun

sym·​me·​try ˈsi-mə-trē 

plural symmetries

1

: balanced proportions

also : beauty of form arising from balanced proportions

2

: the property of being symmetrical

especially : correspondence in size, shape, and relative position of parts on opposite sides of a dividing line or median plane or about a center or axis compare bilateral symmetry, radial symmetry

3

: a rigid motion of a geometric figure that determines a one-to-one mapping onto itself

4

: the property of remaining invariant under certain changes (as of orientation in space, of the sign of the electric charge, of parity, or of the direction of time flow)

—used of physical phenomena and of equations describing them

Synonyms

• balance
• coherence
• concinnity
• consonance
• consonancy
• harmony
• orchestration
• proportion
• symphony
• unity

Examples of symmetry in a Sentence

the symmetry of the human body

The building has perfect symmetry.

Recent Examples on the Web

The triangular arrangement of the photograph’s key elements – and the symmetry of the vertical line formed by the room’s corner at center – gives the image balance, stability and permanence, reflecting the way family and home serve as an anchor for the Chicano community. —Rebecca Senf, The Conversation, 13 Sep. 2024

Regular polygons have the most symmetry in that their sides all have equal length and their angles all have equal measure (like squares and equilateral triangles but unlike rectangles and rhombuses). —Jack Murtagh, Scientific American, 12 Sep. 2024

Every detail, from the dainty flower arrangements in shop windows to the symmetry of sake bottles on bar counters, feels effortless and intentional all at once. —Natalie Stoclet, Forbes, 9 Sep. 2024

The venue will evoke the symmetry between Biden and Lyndon B. Johnson, who withdrew his bid for reelection just as Biden did Sunday. —Rebecca Picciotto,josephine Rozzelle,dan Mangan,ruxandra Iordache,christina Wilkie, CNBC, 23 July 2024

Word History

Etymology

Latin symmetria, from Greek, from symmetros symmetrical, from syn- + metron measure — more at measure

First Known Use

1563, in the meaning defined at sense 1

Phrases Containing symmetry

• bilateral symmetry
• center of symmetry
• radial symmetry

Kids Definition

symmetry

noun

sym·​me·​try ˈsim-ə-trē 

plural symmetries

1

: balanced proportions

2

: close agreement in size, shape, and relative position of parts on opposite sides of a dividing line or plane or around a central point compare bilateral symmetry, radial symmetry

Medical Definition

symmetry

noun

sym·​me·​try ˈsim-ə-trē 

plural symmetries

1

: correspondence in size, shape, and relative position of parts on opposite sides of a dividing line or median plane or about a center or axis see bilateral symmetry, radial symmetry

2

: the property of remaining invariant under certain changes (as of orientation in space, of the sign of the electric charge, of parity, or of the direction of time flow)

—used of physical phenomena and of equations describing them