diaulos
noun
di·au·los
dēˈau̇ˌläs,
dēˈȯˌl-
plural diauli
-au̇ˌlē,
-ȯˌlī
: the double course for footraces in ancient Greece in which the contestants ran down one side of the stadium, turned round a goal, and returned to the starting point
Word History
Etymology
Greek, from di- + aulos pipe, reed instrument like an oboe, racecourse