43f493a0_Soccer_Lingo___AYSO_Region_88__IT_MEANS
[WHEN THEY SAY] arc [THINK] top of the key (basketball) [IT MEANS] 
The arc is the half-circle field marking atop the 18 yard box. Fouls committed inside the arc do not earn a penalty kick.
Soccer Lingo | AYSO Region 88
IT MEANS