sawtooth

noun, plural saw·teeth [saw-teeth] /ˈsɔˌtiθ/.

1. one of the cutting teeth of a saw.
2. any of the small parallel roof structures forming a sawtooth roof.

adjective

3. having a zigzag profile, similar to that of the cutting edge of a saw; sawtoothed; serrate: a sawtooth mountain range.

adjective

1. (of a waveform) having an amplitude that varies linearly with time between two values, the interval in one direction often being much greater than the other
2. having or generating such a waveform

n.c.1600, from saw (n.1) + tooth.