From Wiktionary, the free dictionary
Formed from доя́ (dojá, “to milk”) + -илня (-ilnja).
дои́лня • (doílnja) f
- place where livestock is milked, milking house
- Synonym: доя́рна (dojárna)
- “доилня”, in Речник на българския език [Dictionary of the Bulgarian Language] (in Bulgarian), Sofia: Bulgarian Academy of Sciences, 2014
- “доилня”, in Речник на българския език [Dictionary of the Bulgarian Language] (in Bulgarian), Chitanka, 2010