adder

Từ điển Oxford Advanced Learner 8th

adder [adder adders] BrE [ˈædə(r)] NAmE [ˈædər] noun
a small poisonous snake, often with diamond-shaped marks on its back. Adders are the only poisonous snakes in Britain.

Word Origin:
Old English nædre ‘serpent, adder’, of Germanic origin; related to Dutch adder and German Natter. The initial n was lost in Middle English by wrong division of a naddre; compare with ↑apron and ↑umpire.

• Từ đồng nghĩa / Synonyms:
  common viper, Vipera berus