BUTMENT
Etymology
Noun
butment (plural butments)
(architecture) A buttress of an arch; the supporter, or that part which joins it to the upright pier.
(masonry) The mass of stone or solid work at the end of a bridge, by which the extreme arches are sustained, or by which the end of a bridge without arches is supported.
Source: Wiktionary
But"ment, n. Etym: [Abbreviation of Abutment.]
1. (Arch.)
Definition: A buttress of an arch; the supporter, or that part which joins
it to the upright pier.
2. (Masonry)
Definition: The mass of stone or solid work at the end of a bridge, by
which the extreme arches are sustained, or by which the end of a
bridge without arches is supported. Butment cheek (Carp.), the part
of a mortised timber surrounding the mortise, and against which the
shoulders of the tenon bear. Knight.
Source: Webster’s Unabridged Dictionary 1913 Edition