symmetric

From Latin symmetria from Ancient Greek συμμετρία (summetría).

• IPA^(key): /sɪˈmɛtɹɪk/

symmetric (comparative more symmetric, superlative most symmetric)

1. Symmetrical.
2. (set theory) Of a relation R on a set S, such that xRy if and only if yRx for all members x and y of S (that is, if the relation holds between any element and a second, it also holds between the second and the first).

   "Is a sibling of" is a symmetric relation.

3. (cryptography) Using the same key (or keys that are trivially related) for both encryption and decryption.

• asymmetric
• symmetry

• reflexive
• transitive

• mycterism