Used for balanced correspondence in shape, position, or structure, as in 左右対称, 線対称, and 点対称.
This building is designed with left-right symmetry.
This figure is point-symmetric about its center.
Technical grammar term corresponding to 二人称, especially in discussions of person and words referring to the addressee.
See also: 二人称
In Japanese linguistics, the person referring to the addressee is sometimes called 対称.
This shape is symmetric with respect to the vertical axis.
The left and right wings are in a symmetric relationship.
対称 means 'symmetry' (a balanced correspondence), whereas 対極 means an 'opposite extreme'; they share the kanji 対 but describe different relationships.
自称 (first person) and 対称 (second person, in grammar; also 'symmetry' in general use) are easy to mix up because they share kanji and appear together in grammatical-person terminology.
symmetrical
axis of symmetry; line of symmetry