Definitions

1. noun

a white, crystalline, fragrant, and toxic substance extracted from the tonka bean or other plants, used as a flavoring agent and in perfumes, and also as an anticoagulant in medicine.

“The chemist isolated the coumarin from the tonka bean to create a unique fragrance.”

2. verb

to add coumarin to a substance, typically to give it a distinctive flavor or fragrance.

“The perfumer coumarined the oil to create a scent that was reminiscent of vanilla.”