- Beta cells
- Beta chain
- Beta cryptoxanthin
- Beta cyclodextrin
- Beta decay
- Beta defensin
- Beta defensin 1
- Beta defensin 2
- Beta diversity
- Beta globulin
- Beta globulins
- Beta glucan
- Beta glucosidase
- Beta glucuronidase
- Beta hexachlorocyclohexane
- Beta hydroxy acid
- Beta lactam
- Beta lactam antibiotics
- Beta lactamase
- Beta lactamase inhibitors
- Beta oxidation
- Beta particles
- Beta pinene
- Beta radiation
- Beta receptor
- Beta rhythm
- Beta secretase
- Beta secretase 1
- Beta sheets
- Beta sitosterol
- Beta thalassemia
- Beta thromboglobulin
- Beta tubulin
- Beta turn
- Beta vulgaris
- Beta-2 microglobulin
- Beta-2 transferrin
- Beta-adrenergic agonist
- Beta-alanine
- Beta-carboline
- Beta-carotene
- Beta-catenin
- Beta-defensin 2
- Beta-defensin 3
- Beta-endorphin
- Beta-galactosidase
- Beta-glucan
- Beta-glucosidase
- Beta-glucuronidase
- Beta-lactam antibiotics
- Beta-lactam resistance
- Beta-lactamase
- Beta-lactamase inhibitors
- Beta-lactoglobulin
- Beta-peptide
- Beta-secretase
- Beta-secretase 1
- Beta-sitosterol
- Beta-thalassemia
- Beta-thromboglobulin
- Beta2 agonist
- Beta2-microglobulin
- Betaarterivirus
- Betaarterivirus suid 1
- Betacellulin
- Betacoronavirus
- Betacyanin
- Betaherpesvirinae
- Betahistine
- Betaine
- Betaine homocysteine methyltransferase
- Betalain
- Betalains
- Betamethasone
- Betamethasone acetate
- Betamethasone dipropionate
- Betamethasone sodium phosphate
- Betamethasone valerate
- Betanin
- Betaproteobacteria
- Betaxanthin
- Betaxolol
- Betel
- Betel nut
- Betel nut chewing
- Bethanechol
- Bethesda System
- Bethesda unit
- Bethlem myopathy
- Betrayal trauma
- Betrixaban
- Betulin
- Betulinic acid
- Betz cells
- Bevacizumab
- Bexarotene
- Bezlotoxumab
- Bezoars
- Bezold-Jarisch reflex
- BiP
- Biapenem
- Biarticular muscle
- Bias blind spot
- Bibenzyl
- Bibliotherapy
- Bicalutamide
- Bicarbonate
- Bicarbonate buffer system
- Biceps
- Biceps brachii muscle
- Biceps femoris
- Biceps femoris muscle
- Bicifadine
- Bicinchoninic acid
- Bicinchoninic acid assay
- Bicine
- Bicipital aponeurosis
- Bicipital groove
- Biclustering
- Biconcave disc
- Bicornuate uterus
- Bictegravir
- Bicuculline
- Bicultural identity
- Bicuspid aortic valve
- Bicycle helmet
- Bidens pilosa
- Bidil
- Bielschowsky stain
- Bielschowsky's head tilt test
- Bietti's crystalline dystrophy
- Bifascicular block
- Bifenthrin
- Bifeprunox
- Bifid rib
- Bifidobacteriaceae
- Bifidobacterium
- Bifidobacterium animalis
- Bifidobacterium bifidum
- Bifidobacterium breve
- Bifidobacterium longum
- Bifidus factor
- Biflavonoids
- Bifocal lenses
- Bifocals
- Bifonazole
- Bifrontal craniotomy
- Bifunctional
- Big Five personality traits
- Big five model of personality