A small heraldic square or rectangular charge (design element) used in coat of arms and heraldry designs.
Diminutive form derived from 'billet', from French 'billette'. In heraldry, the term was applied to small rectangular shapes used as symbolic elements in aristocratic coats of arms.
If you ever study medieval heraldry and see a coat of arms covered with small rectangles, those are billettes—and they often symbolized logs or timber, which was a sign of wealth and resource-ownership back then!
Complete word intelligence in one call. Free tier — 50 lookups/day.