Silvia roadholding problem

[old-and-rusty]

Originally Posted by zxocmars

The Imperial fluid ounce is 1/160 of an imperial gallon or 1/20 of an imperial pint or 8 fluid drams, about 1.734 cubic inches or 28.41 millilitres.[1] This volume of water weighs very nearly 1 avoirdupois ounce (it is the volume occupied by one ounce at 62 °F (16.7 °C), weighed in air with brass weights).

Wikipedia is GOD.

That`s pretty comprehensive .
But what does avoirdupois mean (sounds like a french swear word...LOL...)
Regards,
Ian.