The gill is a unit of volume in the imperial unit system and uses the symbol gi.
It represents 1/4 of a pint - so in this instance, it is 1/4 of an imperial pint - therefore measures exactly 142.0653125 ml. It's also equal to 2 imperial cups and 1/32 of an imperial gallon.
It is pronounced with a "J" sound at the beginning - and it actually part of a humorous in the nursery rhyme 'Jack & Jill'.
In the UK it was used throughout pubs as standard measures; for example spirits were served as 1/6 gill as standard. In Scotland it was 1/5 gill and in Ireland 1/4 gill. It's still used in the Republic of Ireland today.
The US dry quart is a unit of volume in the US customary system with the symbol qt.
1 US dry quart is equal to 1/32 US bushels, 1/8 US pecks, 1/4 US dry gallons or 2 US dry pints. The SI / metric equivalent is ≈ 1.101221 L. There are 38.758 imperial fluid ounces in