| bipartisan | bipartidario |
| bipartite | bilateral |
| Bipartite graph | Grafo bipartito |
| biped | bípedo |
| bipedal | bipedal |
| bipedalism | bipedismo |
| biphenyl | bifenilo |
| Biphobia | Bifobia |
| Bipin | Bipin |
| biplane | biplano |
| bipolar | bipolar |
| bipolar disorder | trastorno bipolar |
| Bipolar encoding | Código AMI RZ |
| Bipolar flow | Chorro bipolar |
| Bipolar galaxy | Galaxia bipolar |
| Bipolar group | Grupo bipolar |
| Bipolar junction transistor | Transistor de unión bipolar |
| Bipolar outflow | Flujo bipolar |
| bipolarity | bipolaridad |
| Bir Lehlou | Bir Lehlu |
| birch | abedul |
| birching | flagelación |
| bird | ave |
| Bird flight | Vuelo de las aves |
| Bird Island | Isla Pájaro |
| bird of paradise | ave del paraíso |
| bird of prey | ave de rapiña |
| Bird ringing | Anillamiento de aves |
| bird sanctuary | refugio |
| bird species | especie ornitológica |
| bird's-eye | primavera |
| bird's-eye view | vista panorámica |
| birdbath | pila de baño para pájaros |
| birdbrain | casquivano |
| birdcage | jaula |
| birdcall | reclamo |
| birdcatcher | pajarero |
| birdhouse | avería |
| Birdhouse Skateboards | Birdhouse Skateboards |
| birdie | birdie |
| BirdLife International | Birdlife International |
| birdlime | liga |
| birds | aves |
| Birds Directive | Zona de especial protección para las aves |
| Birds of a feather flock together | Cada oveja con su pareja |
| Birds of Paradise | Paradisaeidae |
| Birds of Prey | Birds of Prey |
| birdseed | alpiste |
| birdsong | reclamo |
| Birendra of Nepal | Birendra de Nepal |
| Birger Brosa | Birger Brosa |
| Birger jarl | Birger Jarl |
| Birger of Sweden | Birger I Magnusson |
| Birgisch | Birgisch |
| Birgit Nilsson | Birgit Nilsson |
| Birgitta | Brígida |
| Birgu | Birgu |
| Biriatou | Biriatou |
| Biriwal Bulga National Park | Parque Nacional Biriwal Bulga |
| Birja | Bolsa de valores |
| Birjand | Birjand |
| Birka | Birka y Hovgården |
| Birke | Betula |
| Birkenau | Birkenau |
| Birkin Bag | Cartera Birkin |
| Birkirkara | Birkirkara |
| Birman | Sagrado de Birmania |
| Birmingham | Birmingham |
| Birmingham International Airport | Aeropuerto Internacional Birmingham |
| Birnie Island | Isla Birnie |
| biro | boligrafo |
| Birobidzhan | Birobidzhán |
| Birobijan | Birobidján |
| Birobizhan | Birobidján |
| Bironico | Bironico |
