The Collaborative International Dictionary
Wiktionary
trithing
n. One of three ancient divisions of a county in England; a riding.
Usage examples of "trithing".
Hear this: 'All counties, hundreds, wapentakes and trithings shall be at the old rents without any additional payment, except our demesne manors.
All counties, hundred, wapentakes, and trithings (except our demesne manors) shall remain at the old rents, and without any additional payment.