See Also: coumarin(medicine)
coumarin(dictionary)
coumarin hydroxylase(medicine)

coumarin (iou)



coumarin noun. M19.
[French coumarine, from coumarou from Portuguese & Spanish cumaru from Tupi, substance from tonka beans: see -IN1.]
An aromatic chromone, C9H6O2, with the smell of new-mown hay, occurring in various plants and used in perfumery etc.