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Noun: plumb rule  plúm rool
  1. A plumb line attached to a narrow board

Derived forms: plumb rules

Type of: perpendicular, plumb line

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plum sauce
plum tomato
plum tree
plumage
plumaged
plumate
plumb
plumb bob
plumb level
plumb line
plumb rule
plumbable
Plumbaginaceae
plumbaginaceous
Plumbaginales
plumbaginous
plumbago
Plumbago europaea
plumbate
plumbeous
plumber