adder's tongue
(亦作 <美> adder-tongue)
noun
1
- a widely distributed fern of open country, with a single pointed oval frond and a straight unbranched spore-bearing stem瓶尔小草。
1.1
- Genus Ophioglossum, family Ophioglossaceae, in particular O.vulgatum.瓶尔小草属, 瓶尔小草科, 尤指瓶尔小草。
2
- North American term for DOG'S-TOOTH VIOLET.〈北美〉同DOG'S-TOOTH VIOLET.