plumb rule
plumb rule · plumb rules
A narrow board with a plumb line fastened to the top, used to determine a perpendicularA narrow board with a plumb line fastened to the top, used to determine a perpendicular.
Meaning
1 sensesA narrow board with a plumb line fastened to the top, used to determine a perpendicular.
a plumb line attached to a narrow board
Forms
plural: plumb rules| Singular | plumb rule |
|---|---|
| Plural | plumb rules |
regular