asymmetric

adjective

not matching in size, shape, or some other measurement

L253906 on Wikidata ↗

Wiktionary

Pronunciation: /ˌeɪ.səˈmɛt.ɹɪk/

adj

Etymology: From a- + symmetric, as Ancient Greek ἀσυμμετρία (asummetría, “disproportion, deformity”).

Not symmetric.
“an asymmetric shape”
“asymmetric gameplay”
Not involving a mutual exchange of keys between the sender and receiver.
Of a relation R on a set S: having the property that for any two elements of S (not necessarily distinct), at least one is not related to the other via R.