"occurring or pertaining to the time before the use of electricity," 1879, from pre- + electric.
Just as her father was thus summoned away, Lotty saw Fred in the distance, waving his arms, and looking like an animated semaphore of the pre-electric epoch. [Arthur Locker, "Tollit's Tragedy," in The Graphic, summer 1879]
predominate
predoom
pre-eclampsia
pre-elect
pre-election
pre-electric
preemie
pre-eminence
pre-eminent
pre-empt
pre-emption
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