3789. ophis -- a snake
... serpent Definition: a serpent, snake; used of the devil or Satan. Word Origin a
prim. word Definition a snake NASB Word Usage serpent (6), serpents (6), snake ...
/greek/3789.htm - 6kGenesis 3:1
Now the serpent was more subtle than any beast of the field which the LORD God had made. And he said to the woman, Yes, has God said, You shall not eat of every tree of the garden?
Torrey's Topical Textbook—AKJV

2 Corinthians 11:3
But I fear, lest by any means, as the serpent beguiled Eve through his subtlety, so your minds should be corrupted from the simplicity that is in Christ.
Torrey's Topical Textbook—AKJV

Revelation 12:9
And the great dragon was cast out, that old serpent, called the Devil, and Satan, which deceives the whole world: he was cast out into the earth, and his angels were cast out with him.
Torrey's Topical Textbook—AKJV

Revelation 20:2
And he laid hold on the dragon, that old serpent, which is the Devil, and Satan, and bound him a thousand years,
Torrey's Topical Textbook—AKJV