gusset

gusset is defined in Webster's Unabridged Dictionary (1913) with 2 senses. The full text of each entry is reproduced verbatim below.

Definitions

  1. 1.Anything resembling a gusset in a garment; as: (a) (Armor) A small piece of chain mail at the openings of the joints beneath the arms. (b) (Mach.) A kind of bracket, or angular piece of iron, fastened in the angles of a structure to give strength or stiffness; esp., the part joining the barrel and the fire box of a locomotive boiler.
  2. 2.(Her.) An abatement or mark of dishonor in a coat of arms, resembling a gusset.

Source: Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).

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