Function: noun
Date: 15th century
1 : a line (as of cord) that has at one end a weight (as a plumb bob) and is used especially to determine verticality
2 : a line directed to the center of gravity of the earth : a vertical line
Function: noun
Date: 15th century
1 : a line (as of cord) that has at one end a weight (as a plumb bob) and is used especially to determine verticality
2 : a line directed to the center of gravity of the earth : a vertical line
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012