plumb line

Found in Anh - Anh (Wordnet)

Definition Noun : A plumb line is a simple tool consisting of a cord with a heavy, pointed weight (called a plumb bob) attached to one end. When suspended, the weight points directly toward the earth's center of gravity, providing a precise reference line that is perfectly vertical or "plumb." Usage The plumb line is used primarily in construction, carpentry, and surveying to establish or check...