viper

vi*per

noun

{bc}a common Eurasian venomous snake ({it}Vipera berus{/it}) that attains a length of about two feet (0.6 meter), varies in color from red, brown, or gray with dark markings to black, and is usually not fatal to humans

viper's bugloss

noun

{bc}a coarse Old World herb ({it}Echium vulgare{/it}) of the borage family that is naturalized in North America and has showy blue tubular flowers with exserted stamens

horned viper

noun

{bc}a venomous viper ({it}Cerastes cerastes{/it} synonym {it}C. cornutus{/it}) of North Africa and the Middle East having a horny process over each eye

pit viper

noun

{bc}any of various mostly New World vipers (subfamily Crotalinae of the family Viperidae) with a sensory pit on each side of the head and hollow perforated retractable fangs