plumb bob

• ثقل مدبب يُعلَّق بحبل يُستخدم لتحديد الاستقامة الرأسية أو العمق، خاصة في البناء والمساحة والبنّائية.

A pointed weight attached to a line, used to determine vertical alignment or depth, especially in construction, surveying, or masonry.

1. Weighted tool for vertical alignmentC1formal

   A pointed weight attached to a string, used to establish a true vertical line (a plumb line) in construction and surveying.

   شاقول

   • The carpenter used a plumb bob to ensure the wall was perfectly straight.
   • Surveyors rely on a plumb bob for accurate vertical measurements.
   • He dropped the plumb bob from the top of the structure to check its alignment.