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1[mass noun] A vanilla-scented compound found in many plants, formerly used for flavouring food.
- ‘The spectrum of coumarin in uncomplexed DNA is shown as the solid curve.’
- ‘We modeled the modified complex by replacing the guanine in the native structure with coumarin and allowing rotation about the glycosidic bond.’
- ‘In this assay a series of sample mixtures with a fixed protein concentration and increasing coumarin concentrations are injected.’
- ‘The benefit of benzopyrones, such as coumarin or flavonoids, remains unproved.’
- ‘Plants make coumarin from an amino acid, phenylalanine.’
- 1.1[count noun] Any derivative of coumarin.
- ‘Herbal medications that may increase the risk of bleeding if used concurrently with ginkgo include the following: feverfew, garlic, ginseng, dong quai, red clover, and other natural coumarins.’
- ‘Because of the presence of coumarins in some clover species, including Trifolium pratense, tests of clotting factors in future trials may be prudent.’
- ‘The most widely used oral anticoagulants are coumarin derivatives.’
- ‘And sweet clovers aren't the only greens using coumarins.’
- ‘They smell like sandalwood, jasmine and honeyed-clove, with touches of coumarin and vanilla.’
Mid 19th century: from French coumarine, from coumarou, via Portuguese and Spanish from Tupi cumarú tonka bean.
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