Buck

Source : Wright, Joseph English Dialect Dictionary
web : https://eddonline4-proj.uibk.ac.at/edd/main.html

BUCK, sb.7 Nhb. Wm. Yks. Chs. Shr. Ken. [buk.]
1. The front cross-piece of a plough, to which the horses
are attached; see also below.
Wm. A prop attached to the shafts of a cart to keep the body
level when the horse is unyoked (B.K.). n.Yks. Also called
Landstroke (I.W.). Chs.1, s.Chs.1 Shr.1 A T-shaped end to the
plough-beam, having notches in it for the purpose of regulating
the draught of the plough. Cf. Copsil.
2. Comp. Buck-chain, a chain connecting the swing-trees
to the cross-piece of a plough. Chs.1
3. A hook or ring for attaching the traces to a plough-beam.
Nhb.1, n.Yks. (W.H.), w.Yks. (J.J.B.)
4. The iron cap into which a ploughshare is fixed. Ken.
(P.M.)
5. The movable handle to a whipsaw. n.Yks. (I.W.)

Source : Century Dictionary ( https://en.wikipedia.org/wiki/Century_Dictionary )