Definition of prime gilt in US English:

prime gilt

noun

Scottish
historical
  • = primage.

Origin

Late 16th century. Apparently either from prime + gilt, or from either Middle Low German prīmegelt, prīmgelt, or Dutch † priemgelt (Middle Dutch priemgelt), both in sense ‘money paid to the captain or crew of a ship for taking care of the cargo’, also ‘bonus or gratuity paid to the captain or crew of a ship’, and both from a first element of uncertain origin + respectively Middle Low German gelt and Middle Dutch gelt ‘money’.

Pronunciation

prime gilt

/ˈprʌɪm ˌɡɪlt/