| fraxin | <chemistry> A colourless crystalline substance, regarded as a glucoside, and found in the bark of the ash (Fraxinus) and along with esculin in the bark of the horse-chestnut. It shows a delicate fluorescence in alkaline solutions. Synonym: paviin. Origin: From Fraxinus. Source: Websters Dictionary (01 Mar 1998) |
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| fraxinus | <botany> A genus of deciduous forest trees, found in the north temperate zone, and including the true ash trees. Fraxinus excelsior is the European ash; F. Americana, the white ash; F. Sambucifolia, the black ash or water ash. Origin: L, the ash tree. Source: Websters Dictionary (01 Mar 1998) |