Definition of symmetrical adjective from the Oxford Advanced American Dictionary

symmetrical

adjective
/sɪˈmɛtrɪkl/
 
(also symmetric
/sɪˈmɛtrɪk/
 
)
 
(of a body, a design, an object, etc.) having two halves, parts, or sides that are the same in size and shapea symmetrical patternPeople's bodies are never quite symmetrical. antonym asymmetric symmetrically
/sɪˈmɛtrɪkli/
 
adverb