coumarin
Concise Oxford English Dictionary © 2008 Oxford University Press:
coumarin /ˈkuːmərɪn/
▶noun Chemistry a vanilla-scented organic compound found in many plants.
– origin C19: from Fr. coumarine, from coumarou, via Port. and Sp. from Tupi cumarú ‘tonka bean’.
'coumarin' also found in these Oxford entries:

