althorn
Concise Oxford English Dictionary © 2008 Oxford University Press:
althorn /ˈalthɔːn/
▶noun a musical instrument of the saxhorn family, especially the alto or tenor saxhorn in E flat.
– origin C19: from Ger., from alt ‘high’ (from L. altus) + Horn ‘horn’.
'althorn' also found in these Oxford entries:

