1A small venomous Eurasian snake that has a dark zigzag pattern on its back and bears live young. Also called viper.
- Vipera berus, family Viperidae
- The mating system and spacing pattern of adders largely agree with those of sand lizards.
- There are also reptiles, like adders or grass snakes, slow-worms and lizards that are prone to fire damage because they cannot get out quickly enough.
- Along with the loss of heather and cottongrass, birds such as the nightjar, woodlark and stone curlew and animals including the adder, grass snake, and viviparous lizard have been put at risk.
1.1Used in names of snakes that are similar or related to the adder, e.g., death adder, puff adder.
- A side-winding adder buries itself just beneath the hot sand exposing only its eyes, patiently waiting for unsuspecting prey.
- The ‘horns’ of his horned adder, resembling a stunning set of false eyelashes, would have drag queens running for cover.
Entry from British & World English dictionary