At a medium tempo, neither fast nor slow(adjective)
A medium tempo.(noun)
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Use "midtempo" in a sentence
"/ Girl Overboard, etc., it seems to be labelled midtempo also."
"Third single will be slow or midtempo, meaning "Speechless" or more likely "Alejandro.""
"His 2009 album, "Kaleidoscope," mixes in midtempo ballads and features vocalists Nelly Furtado, Emily Haines, Jónsi of Sigur Rós and indie rockers Tegan and Sara."