[ 'sɪmɪtri ]
■ noun ( plural symmetries ) the quality of being made up of exactly similar parts facing each other or around an axis.
↘correct or pleasing proportion of parts.
↘similarity or exact correspondence.
↘ Physics & Mathematics the property of being unchanged by a given operation or process.
Derivatives
symmetrize or symmetrise verb
Origin
C16: from Fr. symétrie or L. symmetria , from Gk, from sun- 'with' + metron 'measure'.