| 单词 | adder |
| 释义 | adder n. any of various small venomous snakes, esp. the common viper, Vipera berus, the only poisonous snake in Great Britain. Phrases and idioms adder's tongue any fern of the genus Ophioglossum. Etymology: OE n{aelig}dre: n lost in ME by wrong division of a naddre: cf. APRON, AUGER, UMPIRE |
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