æsculin Chem.
(ˈɛskjʊlɪn)
[f. L. æscul-us a species of oak, in mod. Bot. applied to the horse-chestnut, + -in, chem. form.]
A glucoside contained in the bark of the horse-chestnut and allied trees; a crystalline fluorescent substance of composition C21H24O13.
| 1877 Watts Fownes' Chem. II. 604 The aqueous solution of æsculin is highly fluorescent, the reflected light being of a sky-blue colour. |