" simultaneous "

[Adjective]  | "si*mul*ta*neous" | \ ˌsī-məl-ˈtā-nē-əs \

1: existing or occurring at the same time : exactly coincident

2: satisfied by the same values of the variables

Origin: circa 1660 ;

 Borrowed from Medieval Latin simultāneus "occurring at the same time," from Latin simul "in company, together, at the same time" (going back to an apocopated neuter form of similis "having characteristics in common, like") + Medieval Latin -tāneus, as in instantāneus {see: |instantaneous|instantaneous}, Late Latin momentāneus "momentary," spontāneus "voluntary, unconstrained, {see: |spontaneous|spontaneous}" {mat|similar|};

  * Note : The Dictionary of Medieval Latin from British Sources records one occurrence of simultāneus, in the Tractatus de logica of John Wycliffe. At the entry in that dictionary the word is parsed as from simultās "occurrence at the same time" (distinct from classical Latin simultās "state of animosity") + the suffix -āneus. This analysis is possible but see:ms less likely. Regarding the suffix -āneus see: the etymology and note at {spontaneous|spontaneous}.;

[Adjective]  | "simultaneous"