The word "vipera" is a noun that refers to a specific type of snake known as a viper. Vipers are a family of snakes called Viperidae, which are often characterized by their long, pointed fangs and a triangular-shaped head. They are mostly found in warm climates and are known for their venom, which they use to hunt prey.
In scientific or biological discussions, "vipera" can be used to refer to different species within the viper family. For example, "Vipera berus" refers to the common European adder.
"Vipera" is a specialized term used mainly in scientific contexts to refer to certain types of venomous snakes. When discussing snakes in general, the term "viper" is more commonly used.