pitch line
noun Machinery.
an imaginary line within the profiles of the teeth of a rack, such that it moves against, and at the same rate as, the pitch circle of an engaging pinion.
Origin of pitch line
First recorded in 1790–1800
Words nearby pitch line
pitch cone,
pitch cylinder,
pitch in,
pitch into,
pitch lake,
pitch line,
pitch on,
pitch pine,
pitch pipe,
pitch plane,
pitch shot