Definition of hart's–tongue
1 : a chiefly Eurasian fern (Phyllitis scolopendrium) with simple lanceolate fronds often auriculate at the base
2 : a tropical American fern (Polybotria cervina) of the family Polypodiaceae
3 : strap fern
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Origin and Etymology of hart's–tongue
hart's-tongue from Middle English hertestonge, from hertes (genitive of hert hart) + tonge tongue; hart's-tongue fern from hart's-tongue + fern; from the shape of the fronds
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