gridiron pendulum

noun

a clock pendulum having, as part of its shaft, an arrangement of brass and steel rods having different coefficients of expansion, such that the pendulum has the same length at any temperature.

Words nearby gridiron pendulum

griddle, griddlebread, griddlecake, gride, gridiron, gridiron pendulum, gridiron-tailed lizard, gridlock, grief, grief-stricken, griefer

Origin of gridiron pendulum

First recorded in 1745–55