semantron
semantron is an idiophone or Slavic musical instrument.
Also recorded as Nakos; Simantra.
In detail
semantron is an idiophone or Slavic musical instrument.
Sources
Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.
reference work · Reputable secondary · Wikipedia
“Semantron”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q1195473: semantron
Consult the source