her·pe·tol·o·gy 
(hûr′pĭ-tŏlə-jē)
(hûr′pĭ-tŏlə-jē)n.
The branch of zoology that deals with reptiles and amphibians.
[Greek herpeton, reptile (from herpein, to creep) + -LOGY.]
her′pe·to·logic (-tə-lŏjĭk), her′pe·to·logi·cal adj.
her′pe·to·logi·cal·ly adv.
her′pe·tolo·gist n.