B
- Bacillus: Takaaxo
- Backbone: Lafdhabar
- Backcrossing: Talaal tafiireed
- Bacteria: Bakteeriya / Baaxo
- Bactericide: Bakteeriyodile /Baaxodile
- Bacteriology : Bakteerikasmo / Baaxokasmo
- Burbules: Baarumo
- Bark: Jidhif /jirif
- Barrier: Carqalad
- Basal metabolism: Dheefsasho saleed
- Basidiomycetes:
- Basidium:
- Beans: Atar, Digir
- Bedbug: Tukhaan
- Belly: Buruc
- Beetle: Geesoole
- Biennial: Laba sanaale
- Balateral symmetry: Jeebis dherer
- Bile: Xamayti / Xameeti
- Bile duct: Marin xamayti
- Bilharzia: Dhiigfaraqlow
- Binary Fission: Dhambalan
- Binomial Nomenclature: Magacaabid labaysan
- Biochemistry: Tukhkasmo
- Biogenesis: Nolol ka askun
- Biological control: Xakamayn Noolekaseed
- Biological Factor: Isir noolekaseed
- Biology: Noolekasmo
- Biosphere: Meerenool
- Biosynthesis: Samaysnool
- Biotic community : Beel nafley
- Bisexual : Ubax labeebshe
- Bivalve: qabato
- Blastula: Joogle
- Blight: Awaarayti
- Blood: Dhiig
- Blood clotting: Dhiig xinjirow, Dhiig Xarkag
- Blood group: Kooxaha Dhiigga
- Blood platelets: Huubo dhiig
- Blood pressure: Cadaadis dhiig
- Blood serum: Sayax dhiig
- Blood vessel: Dhuun dhiig
- Blody cavity: Moqor jireed
- Bone: laf
- Bony fish: Kalluun lafeed
- Book lungs: Sanbab Qorriig
- Botulism: Balalo
- Bowman’s Capsule: Jaxaaska Bowmaan
- Brain: Maskax
- Brain stem: Jirrid maskaxeed
- Breathing: Neefsasho
- Bronchial tube: Hunguricad
- Bronchus: Farac Hunguri
- Brownian movement: Dhaqdhaqaaqa barowni
- Bud: Ruqur
- Budding: Ruqurayn
- Bud scales: Jidhif ruqur
- Bulb : Badhi
- Bulbil: Badhiyar
- Bundle Sheath: Gal Xirmo
- Bursa: Dhareeray