What does sawtooth mean?
Sawtooth describes the distinctive teeth of a saw and, by extension, anything with a sharp, repeated zigzag profile. The word can refer literally to a saw blade or its toothed edge, but it is especially familiar in technical language: a sawtooth wave is a signal that rises steadily and then drops sharply, repeating to create a pointed, angular pattern. This waveform is widely used in synthesizers and electronic music because it produces a bright, distinctive sound. In general descriptive use, “sawtooth” evokes rows of triangular points, serrated edges, or sharply irregular contours. The term is more specific than simply “jagged,” since it usually implies a repeated or regular tooth-like structure. It is used in both British and American English and appears in ordinary mechanical contexts as well as in electronics, acoustics, architecture, and visual design.
A saw or blade with sharply pointed teeth along one edge; also, a shape or waveform resembling a row of saw teeth.
"The engineer plotted the signal and recognized a sawtooth pattern."
Having a row of sharp, regularly spaced teeth or a repeated jagged shape.
"The roofline has a distinctive sawtooth design."
The plural is formed by adding -s; it is uncommon because the word is often used attributively to describe a shape, blade, or waveform.
"The technician compared several sawtooths in the signal display."
From a saw to a sound: a sawtooth wave turns a simple zig-zag into the bright, edgy tone associated with synthesizers and animated robots.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does sawtooth come from?
The word is a compound of English “saw” and “tooth,” with the stress pattern reflecting its established technical usage. The component words have long histories: “saw” comes from an Old English form related to cutting, while “tooth” derives from Old English “tōth.” The compound originally referred to the toothed edge or form of a saw, and its use for a waveform developed much later as electronic signals adopted descriptive names based on their shapes. The English elements have cognates in other Germanic languages, including words related to “tooth” and forms meaning “to cut.”
Related word forms
How sawtooth is actually used
The noun and adjective forms are both standard in British and American English. In technical contexts, especially audio and electronics, “sawtooth” is usually used attributively, as in “sawtooth wave.” The word can describe the teeth of a saw as well as anything with a sharp, repeated zigzag profile.
Easily confused with sawtooth
A saw is the complete cutting tool, whereas a sawtooth specifically refers to its toothed edge, a toothed shape, or a sawtooth waveform.
A sawtooth wave rises and falls in straight, repeating ramps, while a sine wave has smooth, rounded peaks and troughs.