Characterized by the curving and twisting of a ophidian (snake): The tourists were following the serpentine route of the river.

People were amazed at the serpentine movements of the dancers on the dance floor.

The politician's explanations were even more serpentine than usual; that is, more complicated and difficult to follow.

As an English word, the adjective serpentine more often has a reference to the movements of snakes than to the snakes themselves.

Of or resembling a serpent, as in form or movement; sinuous, subtly sly, and tempting.