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|Noun||1.||Ruta graveolens - European strong-scented perennial herb with grey-green bitter-tasting leaves; an irritant similar to poison ivy|
rue - leaves sometimes used for flavoring fruit or claret cup but should be used with great caution: can cause irritation like poison ivy
herb, herbaceous plant - a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests