ABUTMENTS
Noun
abutments
plural of abutment
Source: Wiktionary
ABUTMENT
A*but"ment, n.
1. State of abutting.
2. That on or against which a body abuts or presses; as
(a) (Arch.) The solid part of a pier or wall, etc., which receives
the thrust or lateral pressure of an arch, vault, or strut. Gwilt.
(b) (mech.) A fixed point or surface from which resistance or
reaction is obtained, as the cylinder head of a steam engine, the
fulcrum of a lever, etc.
(c) In breech-loading firearms, the block behind the barrel which
receives the pressure due to recoil.
Source: Webster’s Unabridged Dictionary 1913 Edition