垂すい直ちょく同どう期き信しん号ごうMeaningsNoun1. vertical synchronizing signal; VSYNCKanji used垂droop直straight同same期period (of time)信belief号ID numberComposed of垂すい直ちょくvertical; perpendicularNa-adjective同どう期きsame period; corresponding period; same year (of graduation, entering a company, etc.); contemporary; classmate; synchronization; synchronismNoun信しん号ごうsignal; signalling; signaling; traffic light; traffic signalNoun