Definition of throck in US English:

throck

(also drock, drot)

noun

English Regional, West Midlands, Welsh English
  • The share-beam of a plough; = plough-head. Formerly also: †an upright beam connecting the ground-wrist and earthboard of a plough to the handle (obsolete).

Origin

Old English; earliest use found in Harley Glossary. Origin unknown.

Pronunciation

throck

/θrɒk/