from The Century Dictionary and Cyclopedia
- n. An ancient Greek musical instrument, consisting of two single flutes, either similar or different, so joined at the mouthpiece that they could be played together. See cut under auletris.
- n. In anc. Greek games, a double course, in which the racers passed around a goal at the end of the course, and returned to the starting-place.
- n. An ancient Greek itinerary measure, the equivalent of two stadia.
Sorry, no etymologies found.
The foot races were the stadion (on a track of about 190 meters), diaulos (two laps of the track), and a race in which runners wore a helmet and shin guards and carried a shield.
The square or oblong peristyle in a palaestra should be so formed that the circuit of it makes a walk of two stadia, a distance which the Greeks call the [Greek: diaulos].
 In the double course (diaulos) the runner turned (kampto) the post at the end of the stadium.
This forward and backward movement constitutes the _diaulos_: less than this will not satisfy the law as the complex process understood by the _course of post_.
Eight days for the _diaulos_  of the journey, and two, suppose, for getting up a public meeting, composed a cycle of _ten_ before an act received its commentary, before a speech received its refutation, or an appeal its damnatory answer.
It is no matter of wonder or complaint that a paper written by a correspondent a distance of four hundred miles, or something more, from the press, requiring, therefore, a _diaulos_ of above eight hundred miles for every letter and its answer, a distance which becomes strictly infinite in the case when the correspondent sends no answer at all, should exhibit some press errors.
_diaulos_, what is the flux and reflux -- the to and the fro -- the systole and diastole of the respiration -- between you and Liverpool.
[Footnote 52: I mean that they included the progressive or outward-bound course, and equally the regressive or homeward-bound course, within the compass of this one word [Greek: diaulos].
Less than this is only the half section of a _diaulos_.]
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