Strong's Concordance
Original word: צֶ֫פַע;
Transliteration: tsepha'
Definition (short): adder
Definition (full): a serpent
Strong's Exhaustive Concordance
From an unused root meaning to extrude; a viper (as thrusting out the tongue, i.e. Hissing) -- adder, cockatrice.
References
KJV:
At the last it biteth like a serpent, and stingeth like an adder.
NASB:
At the last it bites like a serpent And stings like a viper.
KJV:
And the sucking child shall play on the hole of the asp, and the weaned child shall put his hand on the cockatrice' den.
NASB:
The nursing child will play by the hole of the cobra, And the weaned child will put his hand on the viper's den.
KJV:
Rejoice not thou, whole Palestina, because the rod of him that smote thee is broken: for out of the serpent's root shall come forth a cockatrice, and his fruit shall be a fiery flying serpent.
NASB:
"Do not rejoice, O Philistia, all of you, Because the rod that struck you is broken; For from the serpent's root a viper will come out, And its fruit will be a flying serpent.