China 
Africa 
- Homocystinuria
- Homodimerization
- Homodimers
- Homogamy
- Homogenate
- Homogeneity
- Homogeneous catalyst
- Homogenization
- Homogenizer
- Homogentisic acid
- Homologous chromosomes
- Homologous desensitization
- Homologous recombination
- Homologous series
- Homology
- Homology directed repair
- Homology modeling
- Homolysis
- Homonymous hemianopia
- Homonymous hemianopsia
- Homoplasmy
- Homoplasy
- Homopolymer
- Homopolysaccharide
- Homosalate
- Homoserine
- Homosexual panic
- Homotaurine
- Homotetramer
- Homotrimer
- Homovanillic acid
- Homozygous
- Homozygous familial hypercholesterolemia
- Honey
- Hong Kong flu
- Hong Kong influenza
- Honokiol
- Hookworm
- Hookworm infection
- Hoover's sign
- Hop
- Hope
- Hops
- Hordein
- Hordenine
- Hordeolum
- Horizontal cells
- Horizontal gaze palsy
- Horizontal gene transfer
- Horizontal transmission
- Hormesis
- Hormonal contraception
- Hormonal imprinting
- Hormonal therapies
- Hormonal therapy
- Hormone antagonists
- Hormone receptor
- Hormone receptors
- Hormone replacement therapy
- Hormone response element
- Hormone sensitive lipase
- Hormone-sensitive cancer
- Hormone-sensitive lipase
- Hormones
- Horn
- Horner's syndrome
- Horopter
- Horse meat
- Horseradish peroxidase
- Horseshoe kidney
- Horticultural therapy
- Hospice
- Hospital Anxiety and Depression Scale
- Hospital accreditation
- Hospital acquired pneumonia
- Hospital discharge
- Hospital medicine
- Hospital ward
- Hospital-acquired infections
- Hospitalism
- Hospitalization
- Host adaptation
- Host factors
- Host range
- Host tropism
- Host-pathogen interaction
- Hostility
- Hot cell
- Hot flashes
- Hot flushes
- Hot plate test
- Hot tub
- Hot tub folliculitis
- Hot work
- Hounsfield scale
- House calls
- House-Brackmann score
- Housefly
- Household air pollution
- Household chemicals
- Housekeeping genes
- Houttuynia Cordata
- Hox genes
- HoxA9
- HoxB2
- HoxB4
- HoxB8
- HoxB9
- HoxC6
- Hoxa10
- Hoxa11
- Hoxa13
- Hoxa3
- Hoxa5
- Hoxb1
- Hoxb13
- Hoxb3
- Hoxb7
- Hoxc13
- Hoxd10
- Hoxd11
- Hoxd13
- Hoxd3
- Hoyeraal-Hreidarsson syndrome
- HpaII
- Hsp104
- Hsp20
- Hsp27
- Hsp70
- Hsp90
- Hsp90 inhibitors
- Htr3e
- HuaChanSu
- Huangdi Neijing
- Hughes-Stovin syndrome
- Huh7
- Humalog
- Human Connectome Project
- Human Genome Project
- Human Metabolome Database
- Human Microbiome Project
- Human Protein Atlas
- Human Protein Reference Database
- Human Proteome Organization
- Human T lymphotropic virus 1
- Human T-lymphotropic virus
- Human T-lymphotropic virus 2
- Human albumin
- Human anti-mouse antibody
- Human behavior