1) Curved 2) Curving 3) Full of bends and curves 4) Full of bends or curves 5) Having turns or windings 6) Sinuous 1) Curved 2) Curving 
zigzag
• (a.) Wavering; not steady; flickering. • (a.) Having turns, windings, or flexures. • (a.) Having alternate curvatures in opposite directions; bent in a zigzag manner.
Bent from side to side in a zig-zag form. ... (09 Oct 1997) ... 
Full of bends and curves.
Flex'u·ous adjective [ Latin flexuosus , from flexus a bending, turning.] 1. Having turns, windings, or flexures. 2. (Botany) Having alternate curvatures in opposite directions; bent in a zigzag manner. 3. Wavering; not steady; flickering. Bacon. ...
Having a more or less zigzag or wavy form; said of stems of various kinds.
zigzag
[adj] - having turns or windings
flexuous 1. Having turns or windings: 'The flexuous bed of the stream.' 2. Curving, winding, or turning.
adjective having turns or windings; `the flexuous bed of the stream`
full of bends or curves; sinuous.