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permanent-income hypothesis
permanent-income savings motive
permanent load
permanent magnet
permanent press
permanent set
permanent tooth
permanent wave
permanent way
permanganate
permanganic acid
permatemp
permeability
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permeance
permease
permeate
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permanent way
per·ma·nent way


noun 
Definition:
 
U.K. public railroad track: a railroad track intended for long-term public use, laid with ties on a prepared bed of ground and supported by stones, as opposed to a lightweight or temporary track
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