From Wiktionary, the free dictionary
Agent noun of летя́ (letjá, “to fly”) + -ец (-ec).
лете́ц • (letéc) m
- male pilot (a controller of an aircraft)
- Synonym: пило́т (pilót) (loanword)
- “летец”, in Речник на българския език [Dictionary of the Bulgarian Language] (in Bulgarian), Sofia: Bulgarian Academy of Sciences, 2014
- “летец”, in Речник на българския език [Dictionary of the Bulgarian Language] (in Bulgarian), Chitanka, 2010