bronchus
Concise Oxford English Dictionary © 2008 Oxford University Press:
bronchus /ˈbrɒŋkəs/
▶noun (pl. bronchi /-kʌɪ/) any of the major air passages of the lungs which diverge from the windpipe.
– origin C17: from late L., from Gk bronkhos ‘windpipe’.
'bronchus' also found in these Oxford entries:

