a device for determining perpendicularity, consisting of a narrow board with a plumb line and bob suspended from an upper edge.
[ 1350-1400; ME plomreule ]
a device for determining perpendicularity, consisting of a narrow board with a plumb line and bob suspended from an upper edge.
[ 1350-1400; ME plomreule ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012