Origin: 1425–75; late Middle English (past participle) < Late Latin concatēnātus (past participle of concatēnāre), equivalent to con-con- + Latin catēn(a) chain + -ātus-ate1
c.1600, from L. concatenat-, pp. stem of concatenare "to link together" (see concatenation). As a pp. adj., attested from 1471. Related: Concatenated (pp. adj., 1611); concatenating (1872).