Any of several venomous snakes, especially the viper Vipera aspis of southern Europe, the cobra Naja haje of Africa and the Middle East, or the horned viper.
[Middle English aspis, from Latin, from Greek.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
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