| BPM | Bpm |
| BR | Brindisi |
| bra | sostén |
| Bra-ket notation | Notación cor-chete |
| Brabant | Brabante |
| Brabant Island | Isla Brabante |
| Brabazon Committee | Comité Brabazon |
| Brabham | Brabham Racing Organisation |
| Bracari | Brácaros |
| Braccio da Montone | Braccio da Montone |
| Bracco Italiano | Bracco Italiano |
| brace | vigorizar |
| brace and bit | berbiquí |
| brace oneself | prepararse |
| brace up | animarse |
| bracelet | brazalete |
| bracer | estimulante |
| braces | tirantes |
| brachial | braquial |
| Brachial plexus | Plexo braquial |
| Brachiocephalic artery | Tronco braquiocefálico |
| brachiopod | braquiópodo |
| brachioproctic | braquioproctal |
| brachiosaur | braquiosaurio |
| Brachyceratops | Brachyceratops |
| Brachylophosaurus | Brachylophosaurus |
| Brachylophus | Brachylophus |
| Brachylophus vitiensis | Brachylophus vitiensis |
| Brachypodium | Brachypodium |
| brachyuran | perteneciente a los braquiuros |
| bracing | tónico |
| bracken | helecho |
| bracket | anaquel |
| bracketing | poner entre paréntesis |
| brackets | paréntesis |
| Brackett series | Serie de Brackett |
| brackish | salado |
| brackish water | agua salobre |
| braconid | bracónido |
| Braconidae | Braconidae |
| bract | bráctea |
| brad | puntilla |
| Brad Bird | Brad Bird |
| Brad Delson | Brad Delson |
| Brad Pitt | Brad Pitt |
| Brad Will | Brad Will |
| bradawl | lezna |
| Bradford | Bradford |
| Bradford County | Condado de Bradford |
| Bradford fire | Bradford City Association Football Club |
| Bradley Center | Bradley Center |
| Bradley Joseph | Bradley Joseph |
| Brady Bonds | Plan Brady |
| bradycardia | bradicardia |
| Bradykinin | Bradiquinina |
| brae | ladera de monte |
| brag | jactarse |
| Braga | Braga |
