צֶפַע (tsephaʻtseh'-fah or tsiphoniy tsif-o-nee'noun|masculineserpent|viper)
[Heb] צֶפַע, צִפְעֹנִי ETCBC: צִפְעֹנִי‎ (subs|viper), צֶפַע‎ (subs|serpent) OSHL: r.dj.ab, r.dj.ac TWOT: 1954a 1954b GK: H7625, H7626 Greek: ἀσπίς, θανατόω
Derivation: from an unused root meaning to extrude;
Strong's: a viper (as thrusting out the tongue, i.e. hissing)
KJV: adder, cockatrice.