Nagelprobe

== German == === Etymology === From Nagel +‎ Probe, referring to the Daumennagel (“thumbnail”). This etymology is incomplete. You can help Wiktionary by elaborating on the origins of this term, particularly: === Pronunciation === IPA(key): /ˈnaːɡl̩ˌpʁoːbə/ === Noun === Nagelprobe f (genitive Nagelprobe, plural Nagelproben) litmus test ==== Declension ==== === Further reading === “Nagelprobe” in Duden online “Nagelprobe”, in Digitales Wörterbuch der deutschen Sprache‎[2] (in German)