From Wiktionary, the free dictionary
ми́гам (mígam, “to wink, to blink”) + -ач (-ač)
мига́ч • (migáč) m
- (literal) blinker, flasher
- indicator, signal light (device)
- “мигач”, in Речник на българския език [Dictionary of the Bulgarian Language] (in Bulgarian), Sofia: Bulgarian Academy of Sciences, 2014
- “мигач”, in Речник на българския език [Dictionary of the Bulgarian Language] (in Bulgarian), Chitanka, 2010