Ophiomancy
From BiblePortal Wikipedia
Webster's Dictionary [1]
(n.) Divination by serpents, as by their manner of eating, or by their coils.
Cyclopedia of Biblical, Theological and Ecclesiastical Literature [2]
( Ὄφις , A Serpent, and Μαντεία , divination) , a species of divination practiced in ancient times by means of serpents. (See Divination).