red bean
/ˌrɛd ˈbiːn/noun
1The red-skinned seed of any of several kinds of legume; especially any of various varieties of the common bean Phaseolus vulgaris, and the adzuki bean, Vigna angularis. Chiefly in plural.
2 Australian. The deep red wood of the tree Dysoxylum muelleri (family Meliaceae), of New South Wales and Queensland.
Origin
Mid 17th century; earliest use found in John Evelyn (1620–1706), diarist and writer. From red + bean.