An acid-base indicator which is colorless in acid solution, but turns pink to red as the solution becomes alkaline. It is used medicinally as a cathartic.
Rowan tree
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A european tree (Pyrus aucuparia) related to the apple, butwith pinnate leaves and flat corymbs of small white flowers followedby little bright red berries. Called also roan tree, and mountainash. The name is also applied to two American trees of similar habit(Pyrus Americana, and P. sambucifolia).
Rowan tree meaning & definition 1 of Rowan tree.
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