| Term | Description |
| Bailloné | Applied to a lion holding a staff in his mouth |
| Balista | An engine to throw stones and darts, also called Swepe |
| Banded | Encircled with a band or ribband |
| Bar | Is the diminutive of the fess, and of the same form, containing one-fifth of the field, and may be placed in any part of the escutcheon |
| Barbed | Is derived from the French word "barbé". The five leaves wich appear on the outside of a full-blown rose are, in heraldry, called the barbs, and thus blazoned, a rose gules barbed and seeded proper |
| Barded | A horse in harness is said to be barded and caparisoned. |
| Bar-gemel | Two bars or barrulets placed parallel to each other, the word gemel being deroved from "Gemelli" twins |
| Barnacles | Instruments used by farriers to curb horses |
| Barrulet | The barrulet is one-fourth of a bar, and occupies a twentieth part of the field; never borne singly. Sometimes called a bracelet. When used in couples barrulets are bars gemel. |
| Barry and barruly | The division of the field by horizontal lines into a certain number of equal parts |
| Basilisk | An heraldic monster, ressembling in shape the wivern or cockatrice, but having, at the end of its tail, the head od a dragon |
| Basnet (basinet) | An old name for a helmet |
| Baton | Derived from the French word baston, staff or cudgel, and generally borne as a mark of bastardy. It does not go from side to side of the shield as the bend does; but is couped in the form of a trucheon |
| Battled arrondie | Denotes that the battlement is rounded at the top |
| Battle-imbattled | One battlement upon another |
| Beaked | When the beak and legs of a bird are of a different tincture from the body it is said to be beaked and membered of that tincture |
| Belled | When a falcon or hawk has bells affixed to its legs it is said to be belled. |
| Bend | Is formed by two lines drawn diagonally from the dexter chief to the sinister base, and comprises two parts of the shield |
| Bendlet | A diminutive of the bend. Generally it is half the width of the bend; but sometimes it appears much narrower |
| Bendy | Describes a field or charge divided, diagonally, into four, six, eight, or more egual parts |
| Bezant | The current coin of Byzantium, or Constantinople - in English heraldry, represented as round flat pieces of gold without impress |
| Bezanté | Semé de bezants |
| Bicapitated | Having two heads, such as the two-headed eagle on the arms of Russia, as well as on those of Austria |
| Billeté | Semé de billets |
| Billets | Are oblongs squares, by some supposed to represent brick, by other letters |
| Bird-bolt | A smal arrow with a blunt head |
| Bitted | Said of a horse when borne with a bit of a different tincture from the animal itself, when it is said to be bitted of that color. This term is also used to describe a horse's head with bit and rein; as, "Three horses' heads couped, bitted and reined or." |
| Blood Color | Sanguine |
| Border or bordure | Was formerly a mark of difference, to distinguish one branch of a family from another. Its surrounds the field, occupying one-fifth of it |
| Botonny | Applied to a cross, whose extremities resemble the trefoil |
| Bottoned | Having bottonies, buttons, round buds or knots. They are generally displayed in threes. The term is essentially the same as treffled (trefoiled) |
| Bouget | See water bouget |
| Bowed | Embowed or arched |
| Braced | same as interlaced |
| Brassarts and brassets | Armour for the elbows and arms |
| Bretessé | Imbattled, that has its battlements on each side, one against the other |
| Bullet | A name sometimes given to the ogress or pellet |
| Burgonet | A sort of steel cap, formerly worn by foot soldiers in battle |