Etymology
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asp (n.)

"very venomous snake of Egypt," 1520s, earlier aspis (mid-14c.), from Old French aspe "asp" (13c.) or directly from Latin aspidem (nominative aspis), from Greek aspis "an asp, Egyptian viper," literally "a round shield;" the serpent so called probably in reference to its neck hood. As to the etymology of the Greek word, Beekes finds that "No remotely convincing suggestions have been made." The name was subsequently applied to the common vipers and adders of Europe, which however are only slightly venomous.

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Definitions of asp

asp (n.)
of southern Europe; similar to but smaller than the adder;
Synonyms: asp viper / Vipera aspis
asp (n.)
cobra used by the Pharaohs as a symbol of their power over life and death;
Synonyms: Egyptian cobra / Naja haje
From wordnet.princeton.edu