right-and-left screw
noun
A screw with threads at each end running in opposite directions.
Origin
Early 19th century.
- pronotum
- pronoun
- pronounal
- pronounce
- pronounceability
- pronounceable
- pronounced
- pronouncedly
- pronouncement
- pronouncer
- pronounciability
- pronto
- Prontosil
- Prontosil album
- Prontosil red
- Prontosil rubrum
- Prontosil soluble
- pronuba
- dark
- dark adaptation
- dark-adapted
- Dark Ages
- Dark Blue
- dark chocolate
- dark-coloured