Madrier
Madrier , noun
[French, from Sp. madero, or Portuguese madeiro, from Sp. madera wood for building, timber, Portuguese madeira, Latin materia stuff, materials, lumber. See Matter.]
A thick plank, used for several mechanical purposes
(a)
A plank to receive the mouth of a petard, with which it is applied to anything intended to be broken down.
(b)
A plank or beam used for supporting the earth in mines or fortifications.