Definition of geranium
1
: any of a widely distributed genus (Geranium of the family Geraniaceae, the geranium family) of plants having regular usually white, pink, or purple flowers with elongated styles and glands that alternate with the petals
— called also cranesbill
2
: pelargonium
3
: a vivid or strong red
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Merriam-Webster unabridged
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Time Traveler for geranium
The first known use of geranium was in 1548
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