gusset

gusset is a   Noun

Definition:

[1] A small piece of cloth inserted in a garment, for the purpose of strengthening some part or giving it a tapering enlargement. Seam and gusset and band. Hood.

[2] Anything resembling a gusset in a garment; as:

[3] An abatement or mark of dishonor in a coat of arms, resembling a gusset.

Synonyms: