symmetrical

UK: /sɪˈmɛtrɪk^əl/ US: /sɪˈmɛtrɪkəl/ ,(si me′tri kəl)

WordReference Random House Learner's Dictionary of American English © 2026

sym•met•ri•cal /sɪˈmɛtrɪkəl/  also symˈmet•ric, adj. 

1. Biology characterized by or showing symmetry.

sym•met•ri•cal•ly, adv. See -meter-.

WordReference Random House Unabridged Dictionary of American English © 2026

sym•met•ri•cal  (si me′tri kəl), adj. 

1. Biology characterized by or exhibiting symmetry;
   well-proportioned, as a body or whole;
   regular in form or arrangement of corresponding parts.
2. Mathematics [Geom.]
   • noting two points in a plane such that the line segment joining the points is bisected by an axis:
     Points
     (1, 1) and (1, -1) are symmetrical with respect to the x-axis.
   • noting a set consisting of pairs of points having this relation with respect to the same axis.
   • noting two points in a plane such that the line segment joining the points is bisected by a point or center:
     The points
     (1, 1) and (-1, -1) are symmetrical with respect to (0, 0).
   • noting a set consisting of pairs of points having this relation with respect to the same center.
3. Mathematics Often, symmetric. 
   • noting a square matrix that is equal to its transpose.
   • noting a dyad or dyadic that is equal to its conjugate.
   • noting a relation in which one element in relation to a second implies the second in relation to the first.
4. [Bot.]
   • Botany divisible into two similar parts by more than one plane passing through the center;
     actinomorphic.
   • Botany (of a flower) having the same number of parts in each whorl.
5. Chemistry
   • having a structure that exhibits a regular repeated pattern of the component parts.
   • Chemistry noting a benzene derivative in which three substitutions have occurred at alternate carbon atoms.
6. Pathology affecting corresponding parts simultaneously, as certain diseases.

Also, sym•met′ric. 

• symmetr(y) + -ical 1745–55

sym•met′ri•cal•ly, adv. 
sym•met′ri•cal•ness, n. 
Synonyms

• 1. balanced, orderly, regular, congruent.

Collins Concise English Dictionary © HarperCollins Publishers::

symmetrical / sɪˈmɛtrɪk^əl/ adjective

1. possessing or displaying symmetry
   Compare asymmetric
2. another word for isomerous