| Bwindi Impenetrable National Park | Parque Nacional de la Selva Impenetrable de Bwindi |
| BWV | BWV |
| by | al lado de |
| by a fluke | de casualidad |
| by accident | por equivocación |
| By acclamation | Por aclamación |
| by all means | absolutamente |
| by and large | generalmente |
| by any chance | por casualidad |
| by cable | telegrafico |
| by certified mail | por correo certificado |
| by chance | de improviso |
| by contrast with | con respecto a |
| by degrees | poco a poco |
| BY Draconis star | Estrellas BY Draconis |
| by express | por expreso |
| by far | de lejos |
| by giro | por giro |
| By guesswork | A buen tino |
| by hand | a mano |
| by heart | de memoria |
| by itself | solo |
| by lack of | por falta de |
| By me | Pasaporte |
| by means of | con |
| by mistake | por equivocación |
| by no means | de ninguna manera |
| by now | ya |
| by oneself | solo |
| by order of the authorities | por órdenes superiores |
| by private treaty | por acuerdo privado |
| by reason of | como |
| by registered mail | por correo certificado |
| by superior order | por órdenes superiores |
| by telephone | por teléfono |
| by that means | por eso |
| by the Grace of God | por la Gracia de Dios |
| by the looks of things | por lo que parece |
| by the merest chance | de casualidad |
| By the River Piedra I Sat Down and Wept | A orillas del río Piedra me senté y lloré |
| by the skin of one's teeth | con las justas |
| by the way | a propósito |
| By tomorrow | Para mañana |
| by way of | para |
| by wire | telegrafico |
| by-catch | captura parcial |
| by-election | elección complementaria |
| by-product | resultado |
| by-road | camino vecinal |
| Byakuya Kuchiki | Byakuya Kuchiki |
| Byblis | Byblidaceae |
| Byblos | Biblos |
| Bycicle | Bicicleta |
| Bydgoszcz | Bydgoszcz |
| bye | adiós |
| bye-bye | adiós |
| bye-election | elección complementaria |
| Byeffect | Reacción adversa a medicamento |
| Byelorussia | Bielorrusia |
| Byelorussian | bielorruso |
| Byelorussian SSR | RSS de Bielorrusia |
| bygone | pasado |
| bylaw | reglamento |
| byname | apelativo |
| bypass | desviación |
| byproduct | subproducto |
| byre | establo |
| Byron Nuclear Generating Station | Central Nuclear de Byron |
| Byron Scott | Byron Scott |
| Byronic hero | Héroe byroniano |
| bystander | transeúnte |
| Bystander effect | Efecto espectador |
| Bystrzyca | Bistriţa |
| byte | octeto |
| Byte Order Mark | Marca de orden de bytes |
| Byte-order mark | Marca de orden de bytes |
| Bytecode | Bytecode |
| Bytom | Bytom |
| Bytów | Bytów |
| Bytča | Distrito de Bytča |
| Bytča District | Distrito de Bytča |
| byway | camino apartado |
| byword | adagio |
| Byzantine | bizantino |
| Byzantine architecture | Arquitectura bizantina |
| Byzantine aristocracy and bureaucracy | Títulos y cargos del imperio bizantino |
| Byzantine army | Ejército bizantino |
| Byzantine art | Arte bizantino |
| Byzantine Empire | Imperio Bizantino |
| Byzantine literature | Literatura bizantina |
| Byzantine music | Música bizantina |
| Byzantine Senate | Senado bizantino |
| Byzantine-Sassanid Wars | Guerras Romano-Sasánidas |
| Byzantines | Bizancio |
| Byzantium | Bizancio |
| BZ | Bolzano |
| Bàsquet Manresa | Bàsquet Manresa |
| Báb | Báb |
| Bábism | Babismo |
| Bács-Kiskun | Bács-Kiskun |
| Bánh bao | Baozi |
| Bánovce nad Bebravou | Distrito de Bánovce nad Bebravou |
| Bánovce nad Bebravou District | Distrito de Bánovce nad Bebravou |
