"Asp" is the modern anglicisation of the word "aspis", which in antiquity referred to any one of several venomous snake species found in the Nile region.[1] The specific epithet, aspis, is a Greek word that means "viper".[2] It is believed that aspis referred to what is now known as the Egyptian cobra.[3]
Whether Cleopatra used a snake as the instrument of her suicide has been long debated. Some favour the idea that she chose C. cerastes, but its venom is insufficiently potent, rapid and reliable. A more plausible candidate is the Egyptian cobra or 'asp' (Naja haje).