| bahan bakar | Bahan yang dapat dibuat bereaksi dengan zat lain sehingga melepaskan energi sebagai energi panas atau digunakan untuk pekerjaan. |
| bahan bakar fosil | |
| bahan bakar lembu | |
| bahan feroelektrik | |
| bahan feromagnetik keras | |
| bahan fisil | |
| bahan pembakar | |
| bahan subur | |
| baja | |
| baja berkecepatan tinggi | |
| baja kobalt | |
| baja kromium | |
| baja paduan | |
| bak mandi | |
| band terlarang | |
| bandwidth | |
| bangku piano | |
| banyak ikatan | |
| Bardeen, John (1908–91) | |
| barometer | |
| barometer aneroid | |
| Barometer Fortin | |
| barycentre.dll | |
| barye | |
| baryon | |
| basa nitrogen | |
| Basis Schiff | |
| Basis Schiff | |
| Basov, Nikolai Gennediyevitch (1922–2001) | |
| batang | |
| batang kendali | |
| Batas Chandrasekhar | |
| Batas Eddington | |
| Batas Greisen – Zatsephin – Kuzmin | |
| Batas GZK | |
| baterai | |
| baterai lithium | |
| batu | |
| batu apung | |
| batu bara | |
| batu bara muda | |
| batu gamping | |
| batu kristal | |
| batu magnet | |
| batu topas | |
| baud | |
| Beam | |
| becquerel | |
| Becquerel, Antoine Henri (1852–1908) | |
| bekerja keras | |
| bel | |
| bel listrik | |
| bel logam | |
| belitan | |
| benih | |
| bentuk keto | |
| bentuk laevo | |
| bentuk leuco | |
| beragam | |
| berarti jalan bebas | |
| berarti waktu luang | |
| berat atom | |
| berat jenis | |
| berat molekul | |
| berbelit-belit | |
| berbentuk kerucut | |
| berbunga | |
| berburu | |
| berdamping | |
| berevolusi | |
| Bergius, Friedrich Karl Rudolf (1884–1949) | |
| berinteraksi-model boson | |
| berkarat | |
| berkas molekul | |
| berkelium | |
| berlian | |
| Berlian Matura | |
| berminyak | |
| Bernoulli, Daniel (1700–82) | |
| berputar | |
| bersegi delapan | |
| bersenandung | |
| Berzelius, Jöns Jacob (1779–1848) | |
| besi cor | |
| besi galvanis | |
| besi kasar | |
| besi tahan karat | |
| besi tempa | |
| BET isoterm | |
| beta-besi | |
| betatron | |
| Bevatron | |
| biaya konjugasi | |
| biaya operator | |
| bidang | |
| Bidang Coulomb | |
| Bidang Higgs | |
| bidang konservatif | |
| bidang kritis | |
| bidang yang konsisten dengan diri sendiri | |
| bifenil poliklorinasi | |
| bijih | |
| bijih merak | |
| bijih-bijih | |
| bilangan imajiner | |
| bilangan irasional | |
| bilangan kuantum | |
| bilangan kuantum azimut | |
| bilangan kuantum magnetik | |
| bilangan kuantum orbital | |
| bilangan oksidasi | |
| bilangan oksidasi | |
| bingkai inersia | |
| bingkai menyeret | |
| bintang biner | |
| bintang katai | |
| bintang raksasa | |
| bintang tetap | |
| bioenergetika | |
| biofisika | |
| bioluminescence | |
| biomekanik | |
| bioteknologi | |
| bipiramida trigonal | |
| biprisme | |
| biprisme elektron | |
| birefringence | |
| birefringence melingkar | |
| bis | |
| bit | |
| Black, Joseph (1728–99) | |
| Blokade Coulomb | |
| B-meson | |
| Bohr, Niels Henrik David (1885–1962) | |
| bohrium | |
| bola langit | |
| bola petir | |
| bolometer | |
| Boltzmann, Ludwig Eduard (1844–1906) | |
| bom atom | |
| bom hidrogen | |
| Bondi, Hermann | |
| boson | |
| boson vektor menengah | |
| bosonisasi | |
| Boyle, Robert (1627–91) | |
| Bragg, Sir William Henry (1862–1942) | |
| Brattain, Walter | |
| Braun, Karl Ferdinand (1850–1918) | |
| Bremsstrahlung | |
| broadband | |
| bubur | |
| buckminsterfullerene | |
| buckyball | |
| buckytube | |
| bukaan | |
| bukan metal | |
| bukti | |
| bumi | |
| bungkuk | |
| Bunsen, Robert Wilhelm (1811–99) | |
| busbar | |
| busur listrik | |
| BWR | |
| byte | |
