in grammar, "the arrangement of repeated, parallel, or contrasted words or phrases in pairs with inversion of word order," 1850, Latinized from Greek khiasmos "a placing crosswise, diagonal arrangement" (see chi).
Adam, first of men,
To first of women, Eve.
1766, from Modern Latin tactica, from Greek taktikē (tekhnē) "(art of) arrangement," from fem. of taktikos "pertaining to arrangement" (see tactics). Earlier it meant "a tactician" (1630s), and was in use as an adjective meaning "tactical" (c. 1600).