еднодневка

From еднодне́вен (ednodnéven, “one-day”) +‎ -ка (-ka, feminine suffix).

• IPA^(key): [ɛdnodˈnɛfkɐ]

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еднодне́вка • (ednodnévka) f

1. (literally) something that expires in a day

   → short-term decision, agreement

   → one-hit wonder (e.g. гру́па-еднодне́вка (grúpa-ednodnévka, “one-hit wonder group”))

2. (by extension) daypack (small tourist bagpack enough to bring supplies for one day)
3. mayfly, dayfly, ephemerid (primitive winged insect of order Ephemeroptera, with short adult life (from a few hours to 10-15 days))

   Synonym: ефемерид (efemerid)

• еди́н (edín, “one”) (numeral)
  • едини́ца (ediníca, “one”) (cardinal)
  • едини́чен (ediníčen, “single”)
  • еди́нствен (edínstven, “unique, sole”)
• дне́вен (dnéven, “daily”)

• “еднодневка”, in Речник на българския език [Dictionary of the Bulgarian Language] (in Bulgarian), Sofia: Bulgarian Academy of Sciences, 2014
• “еднодневка”, in Речник на българския език [Dictionary of the Bulgarian Language] (in Bulgarian), Chitanka, 2010