bob
3
8.1
- noun
- /bɑb/
- Specialized
:
plomada
- At each end of the cross, a plumb bob was hung.
- plumb bob
- pendulum bob
- brass plumb bob
Examples
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It looks like a top, a surveyor's instrument, a plumb bob.
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The plumb bob is essential for ensuring that structures are perfectly vertical.
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Not only looks like, it is a plumb bob.
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Bobs were made by running a string lengthwise through about 30 worms and rolling them into a ball.
Academic text (1990) -
The chorobates was an elongated wooden platform, sometimes with a water-filled longitudinal groove, having plumb bobs on each end that were aligned with fiducial marks on the structure.
Academic text (2003) -
The bob at the end of the pendulum helps keep it steady as it swings back and forth.
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As the children watched the bob swing, they were fascinated by its rhythmic motion.
Synonyms
A heavy pointed weight on a string used to show a vertical line
Idioms
Compounds
Surface Forms
Etymology
Bob (pendulum weight) is the heavy weight at the end of a pendulum and is named after the verb bob, 'to move up and down'. The weight is called a bob because it bobs as the pendulum swings.