Esculin \Es*cu"lin\, n. [See {Esculic}.] (Chem.) A glucoside obtained from the {[AE]sculus hippocastanum}, or horse-chestnut, and characterized by its fine blue fluorescent solutions. [Written also {[ae]sculin}.]
Aesculus hippocastanum n : tree having palmate leaves and large clusters of white to red flowers followed by brown shiny inedible seeds [syn: {horse chestnut}, {buckeye}]