noun Date: 1578 any of a genus ( Ophioglossum, family Ophioglossaceae) of small ferns having a spore-bearing stalk resembling a serpent's tongue, dogtooth violet
ADDER'S-TONGUE
Meaning of ADDER'S-TONGUE in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012